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Name
Scans for devices and prints each device name, device type and protocol (ATA or SCSI) info. May be used in conjunction with '-d TYPE' to restrict the scan to a specific TYPE. See also info about platform specific device scan and the DEVICESCAN directive on smartd (8) man page. Dec 07, 2020 It has two internal SATA ports on top, and two external eSATA connectors on back. It seems like, according to the jumper readout, you can switch two interfaces from the ASM1061 chipset (which only supports 2 SATA-III devices over PCIe 1x 2.0) between either the internal or external ports. Classifes port 80 of ipv4 address into nc1 Classification Engine (CE) assists in automatic classification Automatic classification points – Conceptually any point where the kernel object’s attribute changes CKRM implements a useful subset which can be extended as need arises – Tasks: fork, exec, setuid, setgid.
smartctl - Control and Monitor Utility for SMART Disks
Synopsis
smartctl [options] device
Full Path
/usr/sbin/smartctl
Package Version
smartmontools-5.43 2012-06-30 r3573
Description
[This man page is generated for the Linux version of smartmontools. It does not contain info specific to other platforms.]
smartctl controls the Self-Monitoring, Analysis and Reporting Technology (SMART) system built into many ATA-3 and later ATA, IDE and SCSI-3 harddrives. The purpose of SMART is to monitor the reliability of the hard drive and predict drive failures, and to carry out different types of drive self-tests.This version of smartctl is compatible with ATA/ATAPI-7 and earlier standards (see REFERENCES below)
smartctl is a command line utility designed to perform SMART tasks such as printing the SMART self-test and error logs, enabling and disabling SMARTautomatic testing, and initiating device self-tests. Note: if the user issues a SMART command that is (apparently) not implemented by the device,smartctl will print a warning message but issue the command anyway (see the -T, --tolerance option below). This should not cause problems: onmost devices, unimplemented SMART commands issued to a drive are ignored and/or return an error.
smartctl also provides support for polling TapeAlert messages from SCSI tape drives and changers.
The user must specify the device to be controlled or interrogated as the final argument to smartctl. The command set used by the device is oftenderived from the device path but may need help with the '-d' option (for more information see the section on 'ATA, SCSI command sets and SAT' below). Devicepaths are as follows:
LINUX:Use the forms '/dev/hd[a-t]' for IDE/ATA devices, and '/dev/sd[a-z]' for SCSI devices. For SCSI Tape Drives and Changers with TapeAlertsupport use the devices '/dev/nst*' and '/dev/sg*'. For SATA disks accessed with libata, use '/dev/sd[a-z]' and append '-d ata'.For disks behind 3ware controllers you may need '/dev/sd[a-z]' or '/dev/twe[0-9]', '/dev/twa[0-9]' or '/dev/twl[0-9]': see detailsbelow. For disks behind HighPoint RocketRAID controllers you may need '/dev/sd[a-z]'. For disks behind Areca SATA RAID controllers, you need'/dev/sg[2-9]' (note that smartmontools interacts with the Areca controllers via a SCSI generic device which is different than the SCSI device used forreading and writing data)! For HP Smart Array RAID controllers, there are three currently supported drivers: cciss, hpsa, and hpahcisr. For disks accessed viathe cciss driver the device nodes are of the form '/dev/cciss/c[0-9]d0'. For disks accessed via the hpahcisr and hpsa drivers, the device nodes you needare '/dev/sg[0-9]*'. ('lsscsi -g' is helpful in determining which scsi generic device node corresponds to which device.) Use the nodes corresponding tothe RAID controllers, not the nodes corresponding to logical drives. See the -d option below, as well.
if '-' is specified as the device path, smartctl reads and interprets it's own debug output from standard input. See '-r ataioctl' below for details.Based on the device path, smartctl will guess the device type (ATA or SCSI). If necessary, the '-d' option can be used to over-ride this guess
Note that the printed output of smartctl displays most numerical values in base 10 (decimal), but some values are displayed in base 16 (hexadecimal).To distinguish them, the base 16 values are always displayed with a leading '0x', for example: '0xff'. This man page follows the sameconvention.
Options
The options are grouped below into several categories. smartctl will execute the corresponding commands in the order: INFORMATION, ENABLE/DISABLE,DISPLAY DATA, RUN/ABORT TESTS.
Scans for devices and prints each device name, device type and protocol ([ATA] or [SCSI]) info. May be used in conjunction with '-d TYPE' to restrict thescan to a specific TYPE. See also info about platform specific device scan and the DEVICESCAN directive on smartd(8) man page.
This option can be used to create a draft smartd.conf file. All options after '--' are appended to each output line. For example:
errorsonly - only print: For the '-l error' option, if nonzero, the number of errors recorded in the SMART error log and the power-on time when theyoccurred; For the '-l selftest' option, errors recorded in the device self-test log; For the '-H' option, SMART 'disk failing' status or device Attributes(pre-failure or usage) which failed either now or in the past; For the '-A' option, device Attributes (pre-failure or usage) which failed either now or in thepast.
silent - print no output. The only way to learn about what was found is to use the exit status of smartctl (see RETURN VALUES below).
noserial - Do not print the serial number of the device.
auto - attempt to guess the device type from the device name or from controller type info provided by the operating system or from a matching USB IDentry in the drive database. This is the default.
test - prints the guessed type, then opens the device and prints the (possibly changed) TYPE name and then exists without performing any furthercommands.
ata - the device type is ATA. This prevents smartctl from issuing SCSI commands to an ATA device.
scsi - the device type is SCSI. This prevents smartctl from issuing ATA commands to a SCSI device.
sat[,auto][,N] - the device type is SCSI to ATA Translation (SAT). This is for ATA disks that have a SCSI to ATA Translation (SAT) Layer (SATL)between the disk and the operating system. SAT defines two ATA PASS THROUGH SCSI commands, one 12 bytes long and the other 16 bytes long. The default is the 16byte variant which can be overridden with either '-d sat,12' or '-d sat,16'.
[NEW EXPERIMENTAL SMARTCTL FEATURE] If '-d sat,auto' is specified, device type SAT (for ATA/SATA disks) is only used if the SCSI INQUIRY data reports a SATL(VENDOR: 'ATA '). Otherwise device type SCSI (for SCSI/SAS disks) is used.
usbcypress - this device type is for ATA disks that are behind a Cypress USB to PATA bridge. This will use the ATACB proprietary scsi pass throughcommand. The default SCSI operation code is 0x24, but although it can be overridden with '-d usbcypress,0xN', where N is the scsi operation code, you'rerunning the risk of damage to the device or filesystems on it.
usbjmicron - this device type is for SATA disks that are behind a JMicron USB to PATA/SATA bridge. The 48-bit ATA commands (required e.g. for '-lxerror', see below) do not work with all of these bridges and are therefore disabled by default. These commands can be enabled by '-d usbjmicron,x'. If twodisks are connected to a bridge with two ports, an error message is printed if no PORT is specified. The port can be specified by '-d usbjmicron[,x],PORT'where PORT is 0 (master) or 1 (slave). This is not necessary if the device uses a port multiplier to connect multiple disks to one port. The disks appear underseparate /dev/ice names then. CAUTION: Specifying ',x' for a device which does not support it results in I/O errors and may disconnect the drive. The sameapplies if the specified PORT does not exist or is not connected to a disk.
usbsunplus - this device type is for SATA disks that are behind a SunplusIT USB to SATA bridge.
marvell - [Linux only] interact with SATA disks behind Marvell chip-set controllers (using the Marvell rather than libata driver).
megaraid,N - [Linux only] the device consists of one or more SCSI/SAS disks connected to a MegaRAID controller. The non-negative integer N (in therange of 0 to 127 inclusive) denotes which disk on the controller is monitored. Use syntax such as:This interface will also work for Dell PERC controllers. The following /dev/XXX entry must exist:
For PERC2/3/4 controllers: /dev/megadev0
For PERC5/6 controllers: /dev/megaraid_sas_ioctl_node
3ware,N - [FreeBSD and Linux only] the device consists of one or more ATA disks connected to a 3ware RAID controller. The non-negative integer N (inthe range from 0 to 127 inclusive) denotes which disk on the controller is monitored. Use syntax such as:The first two forms, which refer to devices /dev/sda-z and /dev/twe0-15, may be used with 3ware series 6000, 7000, and 8000 series controllers that use the3x-xxxx driver. Note that the /dev/sda-z form is deprecated starting with the Linux 2.6 kernel series and may not be supported by the Linux kernel inthe near future. The final form, which refers to devices /dev/twa0-15, must be used with 3ware 9000 series controllers, which use the 3w-9xxx driver.
The devices /dev/twl0-15 must be used with the 3ware/LSI 9750 series controllers which use the 3w-sas driver.
Note that if the special character device nodes /dev/twl?, /dev/twa? and /dev/twe? do not exist, or exist with the incorrect major or minor numbers,smartctl will recreate them on the fly. Typically /dev/twa0 refers to the first 9000-series controller, /dev/twa1 refers to the second 9000 series controller,and so on. The /dev/twl0 devices refers to the first 9750 series controller, /dev/twl1 resfers to the second 9750 series controller, and so on. Likewise/dev/twe0 refers to the first 6/7/8000-series controller, /dev/twe1 refers to the second 6/7/8000 series controller, and so on.
Note that for the 6/7/8000 controllers, any of the physical disks can be queried or examined using any of the 3ware's SCSI logical device/dev/sd? entries. Thus, if logical device /dev/sda is made up of two physical disks (3ware ports zero and one) and logical device /dev/sdb is made up of twoother physical disks (3ware ports two and three) then you can examine the SMART data on any of the four physical disks using either SCSI device/dev/sda or /dev/sdb. If you need to know which logical SCSI device a particular physical disk (3ware port) is associated with, use the dmesg or SYSLOGoutput to show which SCSI ID corresponds to a particular 3ware unit, and then use the 3ware CLI or 3dm tool to determine which ports (physical disks)correspond to particular 3ware units.
If the value of N corresponds to a port that does not exist on the 3ware controller, or to a port that does not physically have a disk attached toit, the behavior of smartctl depends upon the specific controller model, firmware, Linux kernel and platform. In some cases you will get a warningmessage that the device does not exist. In other cases you will be presented with 'void' data for a non-existent device.
Note that if the /dev/sd? addressing form is used, then older 3w-xxxx drivers do not pass the 'Enable Autosave' ('-S on') and 'Enable AutomaticOffline' ('-o on') commands to the disk, and produce these types of harmless syslog error messages instead: '3w-xxxx: tw_ioctl(): Passthru size(123392) too big'. This can be fixed by upgrading to version 1.02.00.037 or later of the 3w-xxxx driver, or by applying a patch to older versions.Alternatively, use the character device /dev/twe0-15 interface.
The selective self-test functions ('-t select,A-B') are only supported using the character device interface /dev/twl0-15, /dev/twa0-15 and /dev/twe0-15. Thenecessary WRITE LOG commands can not be passed through the SCSI interface.
areca,N - [FreeBSD, Linux, Windows and Cygwin only] the device consists of one or more SATA disks connected to an Areca SATA RAID controller. Thepositive integer N (in the range from 1 to 24 inclusive) denotes which disk on the controller is monitored. On Linux use syntax such as:The first line above addresses the second disk on the first Areca RAID controller. The second line addresses the third disk on the second Areca RAIDcontroller. To help identify the correct device on Linux, use the command:to show the SCSI generic devices (one per line, starting with /dev/sg0). The correct SCSI generic devices to address for smartmontools are the ones with thetype field equal to 3. If the incorrect device is addressed, please read the warning/error messages carefully. They should provide hints about what devices touse.
Important: the Areca controller must have firmware version 1.46 or later. Lower-numbered firmware versions will give (harmless) SCSI error messages and noSMART information.
areca,N/E - [FreeBSD, Linux, Windows and Cygwin only] [NEW EXPERIMENTAL SMARTCTL FEATURE] the device consists of one or more SATA disks connected toan Areca SAS RAID controller. The integer N (range 1 to 128) denotes the channel (slot) and E (range 1 to 8) denotes the enclosure. Important: This requiresupcoming Areca SAS controller firmware version 1.51 or a recent beta version.
cciss,N - [FreeBSD and Linux only] the device consists of one or more SCSI/SAS or SATA disks connected to a cciss RAID controller. The non-negativeinteger N (in the range from 0 to 15 inclusive) denotes which disk on the controller is monitored.
To look at disks behind HP Smart Array controllers, use syntax such as:This will give the smart information about the first physical disk drive (0) connect to the controller at /dev/cciss/c0d0 . (Disk drive numbering is 0based)This will give the SMART information about the second physical disk drive (1) connected to the controller at /dev/sg0
To get the controller device node you will need to run lsscsi -g.
hpt,L/M/N - [FreeBSD and Linux only] the device consists of one or more ATA disks connected to a HighPoint RocketRAID controller. The integer L isthe controller id, the integer M is the channel number, and the integer N is the PMPort number if it is available. The allowed values of L are from 1 to 4inclusive, M are from 1 to 16 inclusive and N from 1 to 4 if PMPort available. And also these values are limited by the model of the HighPoint RocketRAIDcontroller. Use syntax such as:Note that the /dev/sda-z form should be the device node which stands for the disks derived from the HighPoint RocketRAID controllers under Linux and underFreeBSD, it is the character device which the driver registered (eg, /dev/hptrr, /dev/hptmv6).
The behavior of smartctl depends upon whether the command is 'optional' or 'mandatory'. Here 'mandatory' means 'required by theATA/ATAPI-5 Specification if the device implements the SMART command set' and 'optional' means 'not required by the ATA/ATAPI-5 Specification even ifthe device implements the SMART command set.' The 'mandatory' ATA and SMART commands are: (1) ATA IDENTIFY DEVICE, (2) SMART ENABLE/DISABLE ATTRIBUTEAUTOSAVE, (3) SMART ENABLE/DISABLE, and (4) SMART RETURN STATUS.
The valid arguments to this option are:
normal - exit on failure of any mandatory SMART command, and ignore all failures of optional SMART commands. This is the default. Notethat on some devices, issuing unimplemented optional SMART commands doesn't cause an error. This can result in misleading smartctl messages such as'Feature X not implemented', followed shortly by 'Feature X: enabled'. In most such cases, contrary to the final message, Feature X is not enabled.
conservative - exit on failure of any optional SMART command.
permissive - ignore failure(s) of mandatory SMART commands. This option may be given more than once. Each additional use of this option willcause one more additional failure to be ignored. Note that the use of this option can lead to messages like 'Feature X not implemented', followed shortly by'Error: unable to enable Feature X'. In a few such cases, contrary to the final message, Feature X is enabled.
verypermissive - equivalent to giving a large number of '-T permissive' options: ignore failures of any number of mandatory SMARTcommands. Please see the note above.
The valid arguments to this option are:
warn - report the incorrect checksum but carry on in spite of it. This is the default.
exit - exit smartctl.
ignore - continue silently without issuing a warning.
ioctl - report all ioctl() transactions.
ataioctl - report only ioctl() transactions with ATA devices.
scsiioctl - report only ioctl() transactions with SCSI devices. Invoking this once shows the SCSI commands in hex and the corresponding status.Invoking it a second time adds a hex listing of the first 64 bytes of data send to, or received from the device.
Any argument may include a positive integer to specify the level of detail that should be reported. The argument should be followed by a comma then theinteger with no spaces. For example, ataioctl,2 The default level is 1, so '-r ataioctl,1' and '-r ataioctl' are equivalent.
For testing purposes, the output of '-r ataioctl,2' can later be parsed by smartctl itself if '-' is used as device path argument. The ATA commandinput parameters, sector data and return values are reconstructed from the debug report read from stdin. Then smartctl internally simulates an ATAdevice with the same behaviour. This is does not work for SCSI devices yet.
Note: If this option is used it may also be necessary to specify the device type with the '-d' option. Otherwise the device may spin up due to commandsissued during device type autodetection.
The valid arguments to this option are:
never - check the device always, but print the power mode if '-i' is specified.
sleep - check the device unless it is in SLEEP mode.
standby - check the device unless it is in SLEEP or STANDBY mode. In these modes most disks are not spinning, so if you want to prevent a disk fromspinning up, this is probably what you want.
idle - check the device unless it is in SLEEP, STANDBY or IDLE mode. In the IDLE state, most disks are still spinning, so this is probably not whatyou want.
Note that the SMART automatic offline test command is listed as 'Obsolete' in every version of the ATA and ATA/ATAPI Specifications. It was originally partof the SFF-8035i Revision 2.0 specification, but was never part of any ATA specification. However it is implemented and used by many vendors. [Gooddocumentation can be found in IBM's Official Published Disk Specifications. For example the IBM Travelstar 40GNX Hard Disk Drive Specifications (Revision 1.1,22 April 2002, Publication # 1541, Document S07N-7715-02) page 164. You can also read the SFF-8035i Specification -- see REFERENCES below.] You can tell ifautomatic offline testing is supported by seeing if this command enables and disables it, as indicated by the 'Auto Offline Data Collection' part of the SMARTcapabilities report (displayed with '-c').
SMART provides three basic categories of testing. The first category, called 'online' testing, has no effect on the performance of the device.It is turned on by the '-s on' option.
The second category of testing is called 'offline' testing. This type of test can, in principle, degrade the device performance. The '-o on' optioncauses this offline testing to be carried out, automatically, on a regular scheduled basis. Normally, the disk will suspend offline testing while disk accessesare taking place, and then automatically resume it when the disk would otherwise be idle, so in practice it has little effect. Note that a one-time offlinetest can also be carried out immediately upon receipt of a user command. See the '-t offline' option below, which causes a one-time offline test to be carriedout immediately.
The choice (made by the SFF-8035i and ATA specification authors) of the word testing for these first two categories is unfortunate, and often leadsto confusion. In fact these first two categories of online and offline testing could have been more accurately described as online and offline datacollection.
The results of this automatic or immediate offline testing (data collection) are reflected in the values of the SMART Attributes. Thus, if problems orerrors are detected, the values of these Attributes will go below their failure thresholds; some types of errors may also appear in the SMART error log. Theseare visible with the '-A' and '-l error' options respectively.
Some SMART attribute values are updated only during off-line data collection activities; the rest are updated during normal operation of the device orduring both normal operation and off-line testing. The Attribute value table produced by the '-A' option indicates this in the UPDATED column. Attributes ofthe first type are labeled 'Offline' and Attributes of the second type are labeled 'Always'.
The third category of testing (and the only category for which the word 'testing' is really an appropriate choice) is 'self' testing. Thisthird type of test is only performed (immediately) when a command to run it is issued. The '-t' and '-X' options can be used to carry out and abort suchself-tests; please see below for further details.
Any errors detected in the self testing will be shown in the SMART self-test log, which can be examined using the '-l selftest' option.
Note: in this manual page, the word 'Test' is used in connection with the second category just described, e.g. for the 'offline' testing. Thewords 'Self-test' are used in connection with the third category.
The ATA standard does not specify a method to check whether SMART autosave is enabled. Unlike SCSI (below), smartctl is unable to print a warning ifautosave is disabled.
[SCSI] For SCSI devices this toggles the value of the Global Logging Target Save Disabled (GLTSD) bit in the Control Mode Page. Some disk manufacturers setthis bit by default. This prevents error counters, power-up hours and other useful data from being placed in non-volatile storage, so these values may be resetto zero the next time the device is power-cycled. If the GLTSD bit is set then 'smartctl -a' will issue a warning. Use on to clear the GLTSD bit andthus enable saving counters to non-volatile storage. For extreme streaming-video type applications you might consider using off to set the GLTSDbit.
all - Gets all values. This is equivalent toaam[,N|off] - [ATA only] Gets/sets the Automatic Acoustic Management (AAM) feature (if supported). A value of 128 sets the most quiet (slowest) modeand 254 the fastest (loudest) mode, 'off' disables AAM. Devices may support intermediate levels. Values below 128 are defined as vendor specific (0) or retired(1-127). Note that the AAM feature was declared obsolete in ATA ACS-2 Revision 4a (Dec 2010).
apm[,N|off] - [ATA only] Gets/sets the Advanced Power Management (APM) feature on device (if supported). If a value between 1 and 254 is provided, itwill attempt to enable APM and set the specified value, 'off' disables APM. Note the actual behavior depends on the drive, for example some drives disable APMif their value is set above 128. Values below 128 are supposed to allow drive spindown, values 128 and above adjust only head-parking frequency, although theactual behavior defined is also vendor-specific.
lookahead[,on|off] - [ATA only] Gets/sets the read look-ahead feature (if supported). Read look-ahead is usually enabled by default.
security - [ATA only] Gets the status of ATA Security feature (if supported). If ATA Security is enabled an ATA user password is set. The drive willbe locked on next reset then.
security-freeze - [ATA only] Sets ATA Security feature to frozen mode. This prevents that the drive accepts any security commands until next reset.Note that the frozen mode may already be set by BIOS or OS.
standby,[N|off] - [ATA only] Sets the standby (spindown) timer and places the drive in the IDLE mode. A value of 0 or 'off' disables the standbytimer. Values from 1 to 240 specify timeouts from 5 seconds to 20 minutes in 5 second increments. Values from 241 to 251 specify timeouts from 30 minutes to330 minutes in 30 minute increments. Value 252 specifies 21 minutes. Value 253 specifies a vendor specific time between 8 and 12 hours. Value 255 specifies 21minutes and 15 seconds. Some drives may use a vendor specific interpretation for the values. Note that there is no get option because ATA standards do notspecify a method to read the standby timer.
standby,now - [ATA only] Places the drive in the STANDBY mode. This usually spins down the drive. The setting of the standby timer is not affected.
wcache[,on|off] - [ATA only] Gets/sets the volatile write cache feature (if supported). The write cache is usually enabled by default.
If the device reports failing health status, this means either that the device has already failed, or that it is predicting its own failurewithin the next 24 hours. If this happens, use the '-a' option to get more information, and get your data off the disk and to someplace safe as soon as youcan.
Note that the time required to run the Self-tests (listed in minutes) are fixed. However the time required to run the Immediate Offline Test (listed inseconds) is variable. This means that if you issue a command to perform an Immediate Offline test with the '-t offline' option, then the time may jump to alarger value and then count down as the Immediate Offline Test is carried out. Please see REFERENCES below for further information about the the flags andcapabilities described by this option.
Each Attribute has a 'Raw' value, printed under the heading 'RAW_VALUE', and a 'Normalized' value printed under the heading 'VALUE'. [Note: smartctlprints these values in base-10.] In the example just given, the 'Raw Value' for Attribute 12 would be the actual number of times that the disk has beenpower-cycled, for example 365 if the disk has been turned on once per day for exactly one year. Each vendor uses their own algorithm to convert this 'Raw'value to a 'Normalized' value in the range from 1 to 254. Please keep in mind that smartctl only reports the different Attribute types, values, andthresholds as read from the device. It does not carry out the conversion between 'Raw' and 'Normalized' values: this is done by the disk's firmware.
The conversion from Raw value to a quantity with physical units is not specified by the SMART standard. In most cases, the values printed by smartctlare sensible. For example the temperature Attribute generally has its raw value equal to the temperature in Celsius. However in some cases vendors use unusualconventions. For example the Hitachi disk on my laptop reports its power-on hours in minutes, not hours. Some IBM disks track three temperatures rather thanone, in their raw values. And so on.
Each Attribute also has a Threshold value (whose range is 0 to 255) which is printed under the heading 'THRESH'. If the Normalized value is less than orequal to the Threshold value, then the Attribute is said to have failed. If the Attribute is a pre-failure Attribute, then disk failure is imminent.
Each Attribute also has a 'Worst' value shown under the heading 'WORST'. This is the smallest (closest to failure) value that the disk has recorded at anytime during its lifetime when SMART was enabled. [Note however that some vendors firmware may actually increase the 'Worst' value for some 'rate-type'Attributes.]
The Attribute table printed out by smartctl also shows the 'TYPE' of the Attribute. Attributes are one of two possible types: Pre-failure or Old age.Pre-failure Attributes are ones which, if less than or equal to their threshold values, indicate pending disk failure. Old age, or usage Attributes, are oneswhich indicate end-of-product life from old-age or normal aging and wearout, if the Attribute value is less than or equal to the threshold. Please note:the fact that an Attribute is of type 'Pre-fail' does not mean that your disk is about to fail! It only has this meaning if the Attribute's currentNormalized value is less than or equal to the threshold value.
If the Attribute's current Normalized value is less than or equal to the threshold value, then the 'WHEN_FAILED' column will display 'FAILING_NOW'. If not,but the worst recorded value is less than or equal to the threshold value, then this column will display 'In_the_past'. If the 'WHEN_FAILED' column has noentry (indicated by a dash: '-') then this Attribute is OK now (not failing) and has also never failed in the past.
The table column labeled 'UPDATED' shows if the SMART Attribute values are updated during both normal operation and off-line testing, or only during offlinetesting. The former are labeled 'Always' and the latter are labeled 'Offline'.
So to summarize: the Raw Attribute values are the ones that might have a real physical interpretation, such as 'Temperature Celsius', 'Hours', or'Start-Stop Cycles'. Each manufacturer converts these, using their detailed knowledge of the disk's operations and failure modes, to Normalized Attributevalues in the range 1-254. The current and worst (lowest measured) of these Normalized Attribute values are stored on the disk, along with a Threshold valuethat the manufacturer has determined will indicate that the disk is going to fail, or that it has exceeded its design age or aging limit. smartctl doesnot calculate any of the Attribute values, thresholds, or types, it merely reports them from the SMART data on the device.
Note that starting with ATA/ATAPI-4, revision 4, the meaning of these Attribute fields has been made entirely vendor-specific. However most ATA/ATAPI-5disks seem to respect their meaning, so we have retained the option of printing the Attribute values.
[SCSI] For SCSI devices the 'attributes' are obtained from the temperature and start-stop cycle counter log pages. Certain vendor specific attributes arelisted if recognised. The attributes are output in a relatively free format (compared with ATA disk attributes).
old - Old smartctl format. This is the default unless the '-x' option is specified.
brief - New format which fits into 80 colums (except in some rare cases). This format also decodes four additional attribute flags. This is thedefault if the '-x' option is specified.
hex,id - Print all attribute IDs as hexadecimal numbers.
hex,val - Print all normalized values as hexadecimal numbers.
hex - Same as '-f hex,id -f hex,val'.
error - [ATA] prints the Summary SMART error log. SMART disks maintain a log of the most recent five non-trivial errors. For each of these errors,the disk power-on lifetime at which the error occurred is recorded, as is the device status (idle, standby, etc) at the time of the error. For some commontypes of errors, the Error Register (ER) and Status Register (SR) values are decoded and printed as text. The meanings of these are:In addition, up to the last five commands that preceded the error are listed, along with a timestamp measured from the start of the corresponding powercycle. This is displayed in the form Dd+HH:MM:SS.msec where D is the number of days, HH is hours, MM is minutes, SS is seconds and msec is milliseconds. [Note:this time stamp wraps after 2^32 milliseconds, or 49 days 17 hours 2 minutes and 47.296 seconds.] The key ATA disk registers are also recorded in the log. Thefinal column of the error log is a text-string description of the ATA command defined by the Command Register (CR) and Feature Register (FR) values. Commandsthat are obsolete in the most current (ATA-7) spec are listed like this: READ LONG (w/ retry) [OBS-4], indicating that the command became obsolete withor in the ATA-4 specification. Similarly, the notation [RET-N] is used to indicate that a command was retired in the ATA-Nspecification. Some commands are not defined in any version of the ATA specification but are in common use nonetheless; these are marked [NS], meaningnon-standard.
The ATA Specification (ATA-5 Revision 1c, Section 8.41.6.8.2) says: 'Error log structures shall include UNC errors, IDNF errors for which the addressrequested was valid, servo errors, write fault errors, etc. Error log data structures shall not include errors attributed to the receipt of faulty commandssuch as command codes not implemented by the device or requests with invalid parameters or invalid addresses.' The definitions of these terms are:
UNC (UNCorrectable): data is uncorrectable. This refers to data which has been read from the disk, but for which the Error Checking and Correction(ECC) codes are inconsistent. In effect, this means that the data can not be read.
IDNF (ID Not Found): user-accessible address could not be found. For READ LOG type commands, IDNF can also indicate that a device datalog structure checksum was incorrect.
If the command that caused the error was a READ or WRITE command, then the Logical Block Address (LBA) at which the error occurred will be printed in base10 and base 16. The LBA is a linear address, which counts 512-byte sectors on the disk, starting from zero. (Because of the limitations of the SMART error log,if the LBA is greater than 0xfffffff, then either no error log entry will be made, or the error log entry will have an incorrect LBA. This may happen fordrives with a capacity greater than 128 GiB or 137 GB.) On Linux systems the smartmontools web page has instructions about how to convert the LBA address tothe name of the disk file containing the erroneous disk sector.
Please note that some manufacturers ignore the ATA specifications, and make entries in the error log if the device receives a command which is notimplemented or is not valid.
error - [SCSI] prints the error counter log pages for reads, write and verifies. The verify row is only output if it has an element other than zero.
xerror[,NUM][,error] - [ATA only] prints the Extended Comprehensive SMART error log (General Purpose Log address 0x03). Unlike the Summary SMARTerror log (see '-l error' above), it provides sufficient space to log the contents of the 48-bit LBA register set introduced with ATA-6. It also supports logswith more than one sector. Each sector holds up to 4 log entries. The actual number of log sectors is vendor specific, typical values for HDD are 2 (Samsung),5 (Seagate) or 6 (WD). Some recent SSD devices have much larger error logs.
Only the 8 most recent error log entries are printed by default. This number can be changed by the optional parameter NUM.
If ',error' is appended and the Extended Comprehensive SMART error log is not supported, the Summary SMART self-test log is printed.
Please note that recent drives may report errors only in the Extended Comprehensive SMART error log. The Summary SMART error log may be reported assupported but is always empty then.
selftest - [ATA] prints the SMART self-test log. The disk maintains a self-test log showing the results of the self tests, which can be run using the'-t' option described below. For each of the most recent twenty-one self-tests, the log shows the type of test (short or extended, off-line or captive) and thefinal status of the test. If the test did not complete successfully, then the percentage of the test remaining is shown. The time at which the test took place,measured in hours of disk lifetime, is also printed. [Note: this time stamp wraps after 2^16 hours, or 2730 days and 16 hours, or about 7.5 years.] If anyerrors were detected, the Logical Block Address (LBA) of the first error is printed in decimal notation. On Linux systems the smartmontools web page hasinstructions about how to convert this LBA address to the name of the disk file containing the erroneous block.
selftest - [SCSI] the self-test log for a SCSI device has a slightly different format than for an ATA device. For each of the most recent twentyself-tests, it shows the type of test and the status (final or in progress) of the test. SCSI standards use the terms 'foreground' and 'background' (ratherthan ATA's corresponding 'captive' and 'off-line') and 'short' and 'long' (rather than ATA's corresponding 'short' and 'extended') to describe the type of thetest. The printed segment number is only relevant when a test fails in the third or later test segment. It identifies the test that failed and consists ofeither the number of the segment that failed during the test, or the number of the test that failed and the number of the segment in which the test was run,using a vendor-specific method of putting both numbers into a single byte. The Logical Block Address (LBA) of the first error is printed in hexadecimalnotation. On Linux systems the smartmontools web page has instructions about how to convert this LBA address to the name of the disk file containing theerroneous block. If provided, the SCSI Sense Key (SK), Additional Sense Code (ASC) and Additional Sense Code Qualifier (ASQ) are also printed. The self testscan be run using the '-t' option described below (using the ATA test terminology).
xselftest[,NUM][,selftest] - [ATA only] prints the Extended SMART self-test log (General Purpose Log address 0x07). Unlike the SMART self-test log(see '-l selftest' above), it supports 48-bit LBA and logs with more than one sector. Each sector holds up to 19 log entries. The actual number of log sectorsis vendor specific, typical values are 1 (Seagate) or 2 (Samsung).
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Only the 25 most recent log entries are printed by default. This number can be changed by the optional parameter NUM.
If ',selftest' is appended and the Extended SMART self-test log is not supported, the old SMART self-test log is printed.
selective - [ATA only] Please see the '-t select' option below for a description of selective self-tests. The selective self-test log shows thestart/end Logical Block Addresses (LBA) of each of the five test spans, and their current test status. If the span is being tested or the remainder of the diskis being read-scanned, the current 65536-sector block of LBAs being tested is also displayed. The selective self-test log also shows if a read-scan of theremainder of the disk will be carried out after the selective self-test has completed (see '-t afterselect' option) and the time delay before restarting thisread-scan if it is interrupted (see '-t pending' option). This is a new smartmontools feature; please report unusual or incorrect behavior to thesmartmontools-support mailing list.
directory[,gs] - [ATA only] if the device supports the General Purpose Logging feature set (ATA-6 and above) then this prints the Log Directory (thelog at address 0). The Log Directory shows what logs are available and their length in sectors (512 bytes). The contents of the logs at address 1 [SummarySMART error log] and at address 6 [SMART self-test log] may be printed using the previously-described error and selftest arguments to thisoption. If your version of smartctl supports 48-bit ATA commands, both the General Purpose Log (GPL) and SMART Log (SL) directories are printed in one combinedtable. The output can be restricted to the GPL directory or SL directory by '-l directory,q' or '-l directory,s' respectively.
background - [SCSI only] the background scan results log outputs information derived from Background Media Scans (BMS) done after power up and/orperiodically (e.g. every 24 hours) on recent SCSI disks. If supported, the BMS status is output first, indicating whether a background scan is currentlyunderway (and if so a progress percentage), the amount of time the disk has been powered up and the number of scans already completed. Then there is a headerand a line for each background scan 'event'. These will typically be either recovered or unrecoverable errors. That latter group may need some attention. Thereis a description of the background scan mechanism in section 4.18 of SBC-3 revision 6 (see www.t10.org ).
scttemp, scttempsts, scttemphist - [ATA only] prints the disk temperature information provided by the SMART Command Transport (SCT) commands. Theoption 'scttempsts' prints current temperature and temperature ranges returned by the SCT Status command, 'scttemphist' prints temperature limits and thetemperature history table returned by the SCT Data Table command, and 'scttemp' prints both. The temperature values are preserved across power cycles. Thelogging interval can be configured with the '-l scttempint,N[,p]' option, see below. The SCT commands were introduced in ATA-8 ACS and were also supported byin many ATA-7 disks.
scttempint,N[,p] - [ATA only] clears the SCT temperature history table and sets the time interval for temperature logging to N minutes. If ',p' isspecified, the setting is preserved across power cycles. Otherwise, the setting is volatile and will be reverted to the last non-volatile setting by the nexthard reset. The default interval is vendor specific, typical values are 1, 2, or 5 minutes.
scterc[,READTIME,WRITETIME] - [ATA only] prints values and descriptions of the SCT Error Recovery Control settings. These are equivalent to TLER (asused by Western Digital), CCTL (as used by Samsung and Hitachi) and ERC (as used by Seagate). READTIME and WRITETIME arguments (deciseconds) set the specifiedvalues. Values of 0 disable the feature, other values less than 65 are probably not supported. For RAID configurations, this is typically set to 70,70deciseconds.
devstat[,PAGE] - [ATA only] [NEW EXPERIMENTAL SMARTCTL FEATURE] prints values and descriptions of the ATA Device Statistics log pages (GeneralPurpose Log address 0x04). If no PAGE number is specified, entries from all supported pages are printed. If PAGE 0 is specified, the list of supported pages isprinted. Device Statistics was introduced in ATA-8 ACS and is only supported by some recent devices (e.g. Hitachi 7K3000, Intel 320, 330 and 710 Series SSDs,Crucial/Micron m4 SSDs).
sataphy[,reset] - [SATA only] prints values and descriptions of the SATA Phy Event Counters (General Purpose Log address 0x11). If '-l sataphy,reset'is specified, all counters are reset after reading the values.
sasphy[,reset] - [SAS (SCSI) only] prints values and descriptions of the SAS (SSP) Protocol Specific log page (log page 0x18). If '-l sasphy,reset'is specified, all counters are reset after reading the values.
gplog,ADDR[,FIRST[-LAST|+SIZE]] - [ATA only] prints a hex dump of any log accessible via General Purpose Logging (GPL) feature. The log address ADDRis the hex address listed in the log directory (see '-l directory' above). The range of log sectors (pages) can be specified by decimal values FIRST-LAST orFIRST+SIZE. FIRST defaults to 0, SIZE defaults to 1. LAST can be set to 'max' to specify the last page of the log.
smartlog,ADDR[,FIRST[-LAST|+SIZE]] - [ATA only] prints a hex dump of any log accessible via SMART Read Log command. See '-l gplog,...' above forparameter syntax.
For example, all these commands:print pages 10-15 of log 0x80 (first host vendor specific log).
The hex dump format is compatible with the 'xxd -r' command. This command:writes a binary representation of the one sector log 0x11 (SATA Phy Event Counters) to file log.bin.
ssd - [ATA] prints the Solid State Device Statistics log page. This has the same effect as '-l devstat,7', see above.
ssd - [SCSI] prints the Solid State Media percentage used endurance indicator. A value of 0 indicates as new condition while 100 indicates the deviceis at the end of its lifetime as projected by the manufacturer. The value may reach 255.
The Attribute ID can be in the range 1 to 255. If 'N' is specified as ID, the settings for all Attributes are changed.
The optional BYTEORDER consists of 1 to 8 characters from the set '012345rvwz'. The characters '0' to '5' select the byte 0 to 5 from the 48-bit raw value,'r' selects the reserved byte of the attribute data block, 'v' selects the normalized value, 'w' selects the worst value and 'z' inserts a zero byte. Thedefault BYTEORDER is '543210' for all 48-bit formats, 'r543210' for the 54-bit formats, and '543210wv' for the 64-bit formats. For example, '-v 5,raw48:012345'prints the raw value of attribute 5 with big endian instead of little endian byte ordering.
The NAME is a string of letters, digits and underscore. Its length should not exceed 23 characters. The '-P showall' option reports an error if this is thecase.
-v help - Prints (to STDOUT) a list of all valid arguments to this option, then exits.
Valid arguments for FORMAT are:
raw8 - Print the Raw value as six 8-bit unsigned base-10 integers. This may be useful for decoding the meaning of the Raw value.
raw16 - Print the Raw value as three 16-bit unsigned base-10 integers. This may be useful for decoding the meaning of the Raw value.
raw48 - Print the Raw value as a 48-bit unsigned base-10 integer. This is the default for most attributes.
hex48 - Print the Raw value as a 12 digit hexadecimal number. This may be useful for decoding the meaning of the Raw value.
raw56 - Print the Raw value as a 54-bit unsigned base-10 integer. This includes the reserved byte which follows the 48-bit raw value.
hex56 - Print the Raw value as a 14 digit hexadecimal number. This includes the reserved byte which follows the 48-bit raw value.
raw64 - Print the Raw value as a 64-bit unsigned base-10 integer. This includes two bytes from the normalized and worst attribute value. This rawformat is used by some SSD devices with Indilinx controller.
hex64 - Print the Raw value as a 16 digit hexadecimal number. This includes two bytes from the normalized and worst attribute value. This raw formatis used by some SSD devices with Indilinx controller.
min2hour - Raw Attribute is power-on time in minutes. Its raw value will be displayed in the form 'Xh+Ym'. Here X is hours, and Y is minutes in therange 0-59 inclusive. Y is always printed with two digits, for example '06' or '31' or '00'.
sec2hour - Raw Attribute is power-on time in seconds. Its raw value will be displayed in the form 'Xh+Ym+Zs'. Here X is hours, Y is minutes in therange 0-59 inclusive, and Z is seconds in the range 0-59 inclusive. Y and Z are always printed with two digits, for example '06' or '31' or '00'.
halfmin2hour - Raw Attribute is power-on time, measured in units of 30 seconds. This format is used by some Samsung disks. Its raw value will bedisplayed in the form 'Xh+Ym'. Here X is hours, and Y is minutes in the range 0-59 inclusive. Y is always printed with two digits, for example '06' or '31' or'00'.
msec24hour32 - Raw Attribute is power-on time measured in 32-bit hours and 24-bit milliseconds since last hour update. It will be displayed in theform 'Xh+Ym+Z.Ms'. Here X is hours, Y is minutes, Z is seconds and M is milliseconds.
tempminmax - Raw Attribute is the disk temperature in Celsius. Info about Min/Max temperature is printed if available. This is the default forAttributes 190 and 194. The recording interval (lifetime, last power cycle, last soft reset) of the min/max values is device specific.
temp10x - Raw Attribute is ten times the disk temperature in Celsius.
raw16(raw16) - Print the raw attribute as a 16-bit value and two optional 16-bit values if these words are nonzero. This is the default forAttributes 5 and 196.
raw16(avg16) - Raw attribute is spin-up time. It is printed as a 16-bit value and an optional 'Average' 16-bit value if the word is nonzero. This isthe default for Attribute 3.
raw24(raw8) - Print the raw attribute as a 24-bit value and three optional 8-bit values if these bytes are nonzero. This is the default for Attribute9.
raw24/raw24 - Raw Attribute contains two 24-bit values. The first is the number of load cycles. The second is the number of unload cycles. Thedifference between these two values is the number of times that the drive was unexpectedly powered off (also called an emergency unload). As a rule of thumb,the mechanical stress created by one emergency unload is equivalent to that created by one hundred normal unloads.
raw24/raw32 - Raw attribute is an error rate which consists of a 24-bit error count and a 32-bit total count.
The following old arguments to '-v' are also still valid:
9,minutes - same as: 9,min2hour,Power_On_Minutes.
9,seconds - same as: 9,sec2hour,Power_On_Seconds.
9,halfminutes - same as: 9,halfmin2hour,Power_On_Half_Minutes.
9,temp - same as: 9,tempminmax,Temperature_Celsius.
192,emergencyretractcyclect - same as: 192,raw48,Emerg_Retract_Cycle_Ct
193,loadunload - same as: 193,raw24/raw24.
194,10xCelsius - same as: 194,temp10x,Temperature_Celsius_x10.
194,unknown - same as: 194,raw48,Unknown_Attribute.
197,increasing - same as: 197,raw48,Total_Pending_Sectors. Also means that Attribute number 197 (Current Pending Sector Count) is not reset ifuncorrectable sectors are reallocated (see smartd.conf(5) man page).
198,increasing - same as: 198,raw48,Total_Offl_Uncorrectabl. Also means that Attribute number 198 (Offline Uncorrectable Sector Count) is notreset if uncorrectable sectors are reallocated (see smartd.conf(5) man page).
198,offlinescanuncsectorct - same as: 198,raw48,Offline_Scan_UNC_SectCt.
200,writeerrorcount - same as: 200,raw48,Write_Error_Count.
201,detectedtacount - same as: 201,raw48,Detected_TA_Count.
220,temp - same as: 220,raw48,Temperature_Celsius.
Note: a table of hard drive models, listing which Attribute corresponds to temperature, can be found at: http://www.guzu.net/linux/hddtemp.db
none - Assume that the device firmware obeys the ATA specifications. This is the default, unless the device has presets for '-F' in the devicedatabase (see note below).
samsung - In some Samsung disks (example: model SV4012H Firmware Version: RM100-08) some of the two- and four-byte quantities in the SMART datastructures are byte-swapped (relative to the ATA specification). Enabling this option tells smartctl to evaluate these quantities in byte-reversedorder. Some signs that your disk needs this option are (1) no self-test log printed, even though you have run self-tests; (2) very large numbers of ATA errorsreported in the ATA error log; (3) strange and impossible values for the ATA error log timestamps.
samsung2 - In some Samsung disks the number of ATA errors reported is byte swapped. Enabling this option tells smartctl to evaluate thisquantity in byte-reversed order. An indication that your Samsung disk needs this option is that the self-test log is printed correctly, but there are a verylarge number of errors in the SMART error log. This is because the error count is byte swapped. Thus a disk with five errors (0x0005) will appear to have 20480errors (0x5000).
samsung3 - Some Samsung disks (at least SP2514N with Firmware VF100-37) report a self-test still in progress with 0% remaining when the test wasalready completed. Enabling this option modifies the output of the self-test execution status (see options '-c' or '-a' above) accordingly.
Note that an explicit '-F' option on the command line will over-ride any preset values for '-F' (see the '-P' option below).
swapid - Fixes byte swapped ATA identify strings (device name, serial number, firmware version) returned by some buggy device drivers.
smartctl can automatically set appropriate options for known drives. For example, the Maxtor 4D080H4 uses Attribute 9 to stores power-on time inminutes whereas most drives use that Attribute to store the power-on time in hours. The command-line option '-v 9,minutes' ensures that smartctlcorrectly interprets Attribute 9 in this case, but that option is preset for the Maxtor 4D080H4 and so need not be specified by the user on the smartctlcommand line.
The argument show will show any preset options for your drive and the argument showall will show all known drives in the smartmontoolsdatabase, along with their preset options. If there are no presets for your drive and you think there should be (for example, a -v or -F option is needed toget smartctl to display correct values) then please contact the smartmontools developers so that this information can be added to thesmartmontools database. Contact information is at the end of this man page.
The valid arguments to this option are:
use - if a drive is recognized, then use the stored presets for it. This is the default. Note that presets will NOT over-ride additional Attributeinterpretation ('-v N,something') command-line options or explicit '-F' command-line options..
ignore - do not use presets.
show - show if the drive is recognized in the database, and if so, its presets, then exit.
showall - list all recognized drives, and the presets that are set for them, then exit. This also checks the drive database regular expressions andsettings for syntax errors.
The '-P showall' option takes up to two optional arguments to match a specific drive type and firmware version. The command:lists all entries, the command:lists all entries matching MODEL, and the command:lists all entries for this MODEL and a specific FIRMWARE version.
Optional entries are read from the file /etc/smart_drivedb.h if this option is not specified.
If /usr/share/smartmontools/drivedb.h is present, the contents of this file is used instead of the built in table.
Run /usr/sbin/update-smart-drivedb to update this file from the smartmontools SVN repository.
The database files use the same C/C++ syntax that is used to initialize the built in database array. C/C++ style comments are allowed. Example:
All '-t TEST' commands can be given during normal system operation unless captive mode ('-C' option) is used. A running self-test can, however, degradeperformance of the drive. Frequent I/O requests from the operating system increase the duration of a test. These impacts may vary from device to device.
If a test failure occurs then the device may discontinue the testing and report the result immediately.
The valid arguments to this option are:
offline - [ATA] runs SMART Immediate Offline Test. This immediately starts the test described above. This command can be given during normal systemoperation. The effects of this test are visible only in that it updates the SMART Attribute values, and if errors are found they will appear in the SMART errorlog, visible with the '-l error' option.
If the '-c' option to smartctl shows that the device has the 'Suspend Offline collection upon new command' capability then you can track the progressof the Immediate Offline test using the '-c' option to smartctl. If the '-c' option show that the device has the 'Abort Offline collection upon newcommand' capability then most commands will abort the Immediate Offline Test, so you should not try to track the progress of the test with '-c', as it willabort the test.
offline - [SCSI] runs the default self test in foreground. No entry is placed in the self test log.
short - [ATA] runs SMART Short Self Test (usually under ten minutes). This command can be given during normal system operation (unless run in captivemode - see the '-C' option below). This is a test in a different category than the immediate or automatic offline tests. The 'Self' tests check the electricaland mechanical performance as well as the read performance of the disk. Their results are reported in the Self Test Error Log, readable with the '-l selftest'option. Note that on some disks the progress of the self-test can be monitored by watching this log during the self-test; with other disks use the '-c' optionto monitor progress.
short - [SCSI] runs the 'Background short' self-test.
long - [ATA] runs SMART Extended Self Test (tens of minutes). This is a longer and more thorough version of the Short Self Test described above. Notethat this command can be given during normal system operation (unless run in captive mode - see the '-C' option below).
long - [SCSI] runs the 'Background long' self-test.
conveyance - [ATA only] runs a SMART Conveyance Self Test (minutes). This self-test routine is intended to identify damage incurred duringtransporting of the device. This self-test routine should take on the order of minutes to complete. Note that this command can be given during normal systemoperation (unless run in captive mode - see the '-C' option below).
select,N-M, select,N+SIZE - [ATA only] runs a SMART Selective Self Test, to test a range of disk Logical Block Addresses (LBAs), rather thanthe entire disk. Each range of LBAs that is checked is called a 'span' and is specified by a starting LBA (N) and an ending LBA (M) with N less than or equalto M. The range can also be specified as N+SIZE. A span at the end of a disk can be specified by N-max.
For example the commands:both runs a self test on one span consisting of LBAs ten to twenty (inclusive). The command:run a self test from LBA 100000000 up to the end of the disk. The '-t' option can be given up to five times, to test up to five spans. For example thecommand:runs a self test on two spans. The first span consists of 101 LBAs and the second span consists of 1001 LBAs. Note that the spans can overlap partially orcompletely, for example:The results of the selective self-test can be obtained (both during and after the test) by printing the SMART self-test log, using the '-l selftest' optionto smartctl.
Selective self tests are particularly useful as disk capacities increase: an extended self test (smartctl -t long) can take several hours. Selectiveself-tests are helpful if (based on SYSLOG error messages, previous failed self-tests, or SMART error log entries) you suspect that a disk is having problemsat a particular range of Logical Block Addresses (LBAs).
Selective self-tests can be run during normal system operation (unless done in captive mode - see the '-C' option below).
The following variants of the selective self-test command use spans based on the ranges from past tests already stored on the disk:
select,redo[+SIZE] - [ATA only] redo the last SMART Selective Self Test using the same LBA range. The starting LBA is identical to the LBA used bylast test, same for ending LBA unless a new span size is specified by optional +SIZE argument.
For example the commands:have the same effect as:select,next[+SIZE] - [ATA only] runs a SMART Selective Self Test on the LBA range which follows the range of the last test. The starting LBA is setto (ending LBA +1) of the last test. A new span size may be specified by the optional +SIZE argument.
For example the commands:have the same effect as:If the last test ended at the last LBA of the disk, the new range starts at LBA 0. The span size of the last span of a disk is adjusted such that the totalnumber of spans to check the full disk will not be changed by future uses of '-t select,next'.
select,cont[+SIZE] - [ATA only] performs a 'redo' (above) if the self test status reports that the last test was aborted by the host. Otherwise itrun the 'next' (above) test.
afterselect,on - [ATA only] perform an offline read scan after a Selective Self-test has completed. This option must be used together with one ormore of the select,N-M options above. If the LBAs that have been specified in the Selective self-test pass the test with no errors found, then read scanthe remainder of the disk. If the device is powered-cycled while this read scan is in progress, the read scan will be automatically resumed after a timespecified by the pending timer (see below). The value of this option is preserved between selective self-tests.
afterselect,off - [ATA only] do not read scan the remainder of the disk after a Selective self-test has completed. This option must be use togetherwith one or more of the select,N-M options above. The value of this option is preserved between selective self-tests.
pending,N - [ATA only] set the pending offline read scan timer to N minutes. Here N is an integer in the range from 0 to 65535 inclusive. If thedevice is powered off during a read scan after a Selective self-test, then resume the test automatically N minutes after power-up. This option must be usetogether with one or more of the select,N-M options above. The value of this option is preserved between selective self-tests.
vendor,N - [ATA only] issues the ATA command SMART EXECUTE OFF-LINE IMMEDIATE with subcommand N in LBA LOW register. The subcommand is specified as ahex value in the range 0x00 to 0xff. Subcommands 0x40-0x7e and 0x90-0xff are reserved for vendor specific use, see table 61 of T13/1699-D Revision 6a(ATA8-ACS). Note that the subcommands 0x00-0x04,0x7f,0x81-0x84 are supported by other smartctl options (e.g. 0x01: '-t short', 0x7f: '-X', 0x82: '-C -t long').
WARNING: Only run subcommands documented by the vendor of the device.
Example for Intel (X18/X25-M G2, 320, 520 and 710 Series) SSDs only: The subcommand 0x40 ('-t vendor,0x40') clears the timed workload related SMARTattributes (226, 227, 228). Note that the raw values of these attributes are held at 65535 (0xffff) until the workload timer reaches 60 minutes.
force - [ATA only] start new self-test even if another test is already running. By default a running self-test will not be interrupted to beginanother test.
scttempint,N[,p] - is no longer supported, use '-l scttempint,N[,p]' instead, see above.
[ATA] Runs self-tests in captive mode. This has no effect with '-t offline' or if the '-t' option is not used.WARNING: Tests run in captive mode may busy out the drive for the length of the test. Only run captive tests on drives without any mountedpartitions!
[SCSI] Runs the self-test in 'Foreground' mode.
ATA, SCSI command sets and SAT
In the past there has been a clear distinction between storage devices that used the ATA and SCSI command sets. This distinction was often reflected intheir device naming and hardware. Now various SCSI transports (e.g. SAS, FC and iSCSI) can interconnect to both SCSI disks (e.g. FC and SAS) and ATA disks(especially SATA). USB and IEEE 1394 storage devices use the SCSI command set externally but almost always contain ATA or SATA disks (or flash). The storagesubsystems in some operating systems have started to remove the distinction between ATA and SCSI in their device naming policies.
99% of operations that an OS performs on a disk involve the SCSI INQUIRY, READ CAPACITY, READ and WRITE commands, or their ATA equivalents. Since the SCSIcommands are slightly more general than their ATA equivalents, many OSes are generating SCSI commands (mainly READ and WRITE) and letting a lower leveltranslate them to their ATA equivalents as the need arises. An important note here is that 'lower level' may be in external equipment and hence outside thecontrol of an OS.
SCSI to ATA Translation (SAT) is a standard (ANSI INCITS 431-2007) that specifies how this translation is done. For the other 1% of operations that an OSperforms on a disk, SAT provides two options. First is an optional ATA PASS-THROUGH SCSI command (there are two variants). The second is a translation from theclosest SCSI command. Most current interest is in the 'pass-through' option.
The relevance to smartmontools (and hence smartctl) is that its interactions with disks fall solidly into the '1%' category. So even if the OS can happilytreat (and name) a disk as 'SCSI', smartmontools needs to detect the native command set and act accordingly. As more storage manufacturers (including externalSATA drives) comply with SAT, smartmontools is able to automatically distinguish the native command set of the device. In some cases the '-d sat' option isneeded on the command line.
There are also virtual disks which typically have no useful information to convey to smartmontools, but could conceivably in the future. An example of avirtual disk is the OS's view of a RAID 1 box. There are most likely two SATA disks inside a RAID 1 box. Addressing those SATA disks from a distant OS is achallenge for smartmontools. Another approach is running a tool like smartmontools inside the RAID 1 box (e.g. a Network Attached Storage (NAS) box) andfetching the logs via a browser.
Examples
Print a large amount of SMART information for drive /dev/hda which is typically an ATA (IDE) or SATA disk in Linux.Print a large amount of SMART information for drive /dev/sdb . This may be a SCSI disk or an ATA (SATA) disk.Disable SMART monitoring and data log collection on drive /dev/hdd .Enable SMART on drive /dev/hda, enable automatic offline testing every four hours, and enable autosaving of SMART Attributes. This is a good start-up linefor your system's init files. You can issue this command on a running system.Begin an extended self-test of drive /dev/hdc. You can issue this command on a running system. The results can be seen in the self-test log visible with the'-l selftest' option after it has completed.Enable SMART on the disk, and begin an immediate offline test of drive /dev/hda. You can issue this command on a running system. The results are only usedto update the SMART Attributes, visible with the '-A' option. If any device errors occur, they are logged to the SMART error log, which can be seen with the'-l error' option.Shows the vendor Attributes, when the disk stores its power-on time internally in minutes rather than hours.Produces output only if the device returns failing SMART status, or if some of the logged self-tests ended with errors.Examine all SMART data for device /dev/hda, but produce no printed output. You must use the exit status (the $? shell variable) to learn if anyAttributes are out of bound, if the SMART status is failing, if there are errors recorded in the self-test log, or if there are errors recorded in the diskerror log.Examine all SMART data for the first ATA disk connected to a 3ware RAID controller card.Examine all SMART data for the first ATA disk connected to a 3ware RAID 6000/7000/8000 controller card.Examine all SMART data for the first ATA disk connected to a 3ware RAID 9000 controller card.Examine all SMART data for the first SATA (not SAS) disk connected to a 3ware RAID 9750 controller card.Start a short self-test on the fourth ATA disk connected to the 3ware RAID controller card which is the second SCSI device /dev/sdb.Start a long self-test on the fourth SATA disk connected to an Areca RAID controller addressed by /dev/sg2.Examine all SMART data for the (S)ATA disk directly connected to the third channel of the first HighPoint RocketRAID controller card.Start a short self-test on the (S)ATA disk connected to second pmport on the first channel of the first HighPoint RocketRAID controller card.Run a selective self-test on LBAs 10 to 100 and 30 to 300. After the these LBAs have been tested, read-scan the remainder of the disk. If the disk ispower-cycled during the read-scan, resume the scan 45 minutes after power to the device is restored.Examine all SMART data for the first SCSI disk connected to a cciss RAID controller card.Return Values
The return values of smartctl are defined by a bitmask. If all is well with the disk, the return value (exit status) of smartctl is 0 (allbits turned off). If a problem occurs, or an error, potential error, or fault is detected, then a non-zero status is returned. In this case, the eightdifferent bits in the return value have the following meanings for ATA disks; some of these values may also be returned for SCSI disks.
Bit 0:Command line did not parse.
Bit 1:
Device open failed, device did not return an IDENTIFY DEVICE structure, or device is in a low-power mode (see '-n' option above).
Bit 2:
Some SMART or other ATA command to the disk failed, or there was a checksum error in a SMART data structure (see '-b' option above).
Bit 3:
SMART status check returned 'DISK FAILING'.
Bit 4:
We found prefail Attributes <= threshold.
Bit 5:
SMART status check returned 'DISK OK' but we found that some (usage or prefail) Attributes have been <= threshold at some time in the past.
Bit 6:
The device error log contains records of errors.
Bit 7:
The device self-test log contains records of errors. [ATA only] Failed self-tests outdated by a newer successful extended self-test are ignored.
To test within the shell for whether or not the different bits are turned on or off, you can use the following type of construction (this is bash syntax):This looks at only at bit 3 of the exit status $? (since 8=2^3). The shell variable $smartstat will be nonzero if SMART status check returned 'diskfailing' and zero otherwise.This bash script prints all status bits:
Notes
The TapeAlert log page flags are cleared for the initiator when the page is read. This means that each alert condition is reported only once bysmartctl for each initiator for each activation of the condition.
Author
Bruce Allensmartmontools-support@lists.sourceforge.net
University of Wisconsin - Milwaukee Physics Department
Contributors
The following have made large contributions to smartmontools:Many other individuals have made smaller contributions and corrections.
Credits
This code was derived from the smartsuite package, written by Michael Cornwell, and from the previous UCSC smartsuite package. It extends these to coverATA-5 disks. This code was originally developed as a Senior Thesis by Michael Cornwell at the Concurrent Systems Laboratory (now part of the Storage SystemsResearch Center), Jack Baskin School of Engineering, University of California, Santa Cruz. http://ssrc.soe.ucsc.edu/ .
HOME PAGE FOR SMARTMONTOOLS:
Please see the following web site for updates, further documentation, bug reports and patches: http://smartmontools.sourceforge.net/
SEE ALSO:
smartd(8), badblocks(8), ide-smart(8).
References For Smart
An introductory article about smartmontools is Monitoring Hard Disks with SMART, by Bruce Allen, Linux Journal, January 2004, pages 74-77. This ishttp://www.linuxjournal.com/article/6983 online.
If you would like to understand better how SMART works, and what it does, a good place to start is with Sections 4.8 and 6.54 of the first volume of the 'ATAttachment with Packet Interface-7' (ATA/ATAPI-7) specification Revision 4b. This documents the SMART functionality which the smartmontools utilitiesprovide access to.
The functioning of SMART was originally defined by the SFF-8035i revision 2 and the SFF-8055i revision 1.4 specifications. These are publications of theSmall Form Factors (SFF) Committee.
Links to these and other documents may be found on the Links page of the smartmontools Wiki athttp://sourceforge.net/apps/trac/smartmontools/wiki/Links .
SVN ID OF THIS PAGE:
Franke Kaffeemaschinen Port Devices Driver Manual
$Id: smartctl.8.in 3568 2012-06-25 19:30:59Z chrfranke $
Referenced By
dstat(1),Franke Kaffeemaschinen Port Devices Driver Updater
hddtempFranke Kaffeemaschinen Port Devices Driver Updater
(8)