smartctl is a command line tool for controlling the SMART (Self-Monitoring, Analysis and Reporting Technology) features of hard disks and SSDs, and a component of Smartmontools. The objective of SMART is to monitor the reliability of hard disks and SSDs, as well as to give the ability to run certain drive tests. The Smartmontools include the command line tool smartctl and the smartd Daemon. The Smartmontools are available in a wide selection of our most popular operating systems (Darwin (Mac OS X), Linux, FreeBSD, NetBSD, OpenBSD, Solaris, OS/2, Cygwin, QNX, eComStation, Windows). The article, however, refers to the Linux version.
Smartmontools is available in the repositories of many Linux distributions. For Ubuntu, install the package with the following command:
sudo apt-get install smartmontools
Now smartctl is ready for use.
Before using smartctl, check to see if the hard disk in use supports S.M.A.R.T.:
sudo smartctl -i /dev/sdc
The following data should be present in the output:
SMART support is: Available - device has SMART capability. SMART support is: Enabled
In case SMART support is available, but for some reason is not activated, try using
sudo smartctl -s on /dev/sdc
to assist with activation.
Viewing the SMART Attributes
To display the SMART attributes of the hard disk, perform the following command:
sudo smartctl -a /dev/sdc
smartctl 5.41 2011-06-09 r3365 [x86_64-linux-3.5.0-39-generic] (local build) Copyright (C) 2002-11 by Bruce Allen, http://smartmontools.sourceforge.net === START OF INFORMATION SECTION === Model Family: Western Digital RE4 Serial ATA Device Model: WDC WD5003ABYX-01WERA1 Serial Number: WD-WMAYP5453158 LU WWN Device Id: 5 0014ee 00385d526 Firmware Version: 01.01S02 User Capacity: 500,107,862,016 bytes [500 GB] Sector Size: 512 bytes logical/physical Device is: In smartctl database [for details use: -P show] ATA Version is: 8 ATA Standard is: Exact ATA specification draft version not indicated Local Time is: Tue Sep 3 09:05:27 2013 CEST SMART support is: Available - device has SMART capability. SMART support is: Enabled === START OF READ SMART DATA SECTION === SMART overall-health self-assessment test result: PASSED General SMART Values: Offline data collection status: (0x82) Offline data collection activity was completed without error. Auto Offline Data Collection: Enabled. Self-test execution status: ( 0) The previous self-test routine completed without error or no self-test has ever been run. Total time to complete Offline data collection: ( 8160) seconds. Offline data collection capabilities: (0x7b) SMART execute Offline immediate. Auto Offline data collection on/off support. Suspend Offline collection upon new command. Offline surface scan supported. Self-test supported. Conveyance Self-test supported. Selective Self-test supported. SMART capabilities: (0x0003) Saves SMART data before entering power-saving mode. Supports SMART auto save timer. Error logging capability: (0x01) Error logging supported. General Purpose Logging supported. Short self-test routine recommended polling time: ( 2) minutes. Extended self-test routine recommended polling time: ( 83) minutes. Conveyance self-test routine recommended polling time: ( 5) minutes. SCT capabilities: (0x303f) SCT Status supported. SCT Error Recovery Control supported. SCT Feature Control supported. SCT Data Table supported. SMART Attributes Data Structure revision number: 16 Vendor Specific SMART Attributes with Thresholds: ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE 1 Raw_Read_Error_Rate 0x002f 200 200 051 Pre-fail Always - 0 3 Spin_Up_Time 0x0027 144 143 021 Pre-fail Always - 3775 4 Start_Stop_Count 0x0032 100 100 000 Old_age Always - 28 5 Reallocated_Sector_Ct 0x0033 200 200 140 Pre-fail Always - 0 7 Seek_Error_Rate 0x002e 200 200 000 Old_age Always - 0 9 Power_On_Hours 0x0032 098 098 000 Old_age Always - 2090 10 Spin_Retry_Count 0x0032 100 253 000 Old_age Always - 0 11 Calibration_Retry_Count 0x0032 100 253 000 Old_age Always - 0 12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 27 192 Power-Off_Retract_Count 0x0032 200 200 000 Old_age Always - 24 193 Load_Cycle_Count 0x0032 200 200 000 Old_age Always - 3 194 Temperature_Celsius 0x0022 117 103 000 Old_age Always - 26 196 Reallocated_Event_Count 0x0032 200 200 000 Old_age Always - 0 197 Current_Pending_Sector 0x0032 200 200 000 Old_age Always - 0 198 Offline_Uncorrectable 0x0030 200 200 000 Old_age Offline - 0 199 UDMA_CRC_Error_Count 0x0032 200 200 000 Old_age Always - 0 200 Multi_Zone_Error_Rate 0x0008 200 200 000 Old_age Offline - 0 SMART Error Log Version: 1 No Errors Logged SMART Self-test log structure revision number 1 Num Test_Description Status Remaining LifeTime(hours) LBA_of_first_error # 1 Short offline Completed without error 00% 2089 - # 2 Extended offline Completed without error 00% 2087 - # 3 Short offline Completed without error 00% 2084 - SMART Selective self-test log data structure revision number 1 SPAN MIN_LBA MAX_LBA CURRENT_TEST_STATUS 1 0 0 Not_testing 2 0 0 Not_testing 3 0 0 Not_testing 4 0 0 Not_testing 5 0 0 Not_testing Selective self-test flags (0x0): After scanning selected spans, do NOT read-scan remainder of disk. If Selective self-test is pending on power-up, resume after 0 minute delay.
Important SMART Attributes
The following parameters may provide information concerning an impending hard drive failure.
- Reallocated Sectors Count: Number of sectors that have been reallocated due to read errors (remaped).
- Spin Retry Count: Number of attempts that have been required ot bring the spindel to operating speed.
- Reallocation Event Count: Number of remaps that have been carried out both (successful and unsuccessful).
- Current Pending Sector Count: Number of sectors waiting for remapping.
- Offline_Uncorrectable: Number of uncorrectable errors when accessing (read/write) to sectors.
Performing of Tests
For information regarding performing SMART tests, see the following article: SMART tests with smartctl.