SMART (Self-Monitoring, Analysis, and Reporting Technology) allows you to see the status or overall health of a hard drive. This information is instumental in providing warning signs of problems with a hard drive.
All Linux distributions provide the smartmontools package, which contain the smartctl program used to display SMART information from attached drives. This package also provides the smartd daemon which periodically polls the drives to obtain SMART information.
Using smartd is essential as it can let you know immediately when a SMART attribute fails.
With the -i option, you can view the type of drive, its serial number, and so forth. In a system with a lot of drives, having this information recorded can assist in knowing which drive device (i.e., /dev/sda) corresponds with which physical drive.
Install:
# yum install smartmontools
Now start the service of Smartctl.
#service smartd start # chkconfig smartd on
To enable Smart Capability for the disk run below command.
#smartctl -s on /dev/sdb
To disable Smart Capability for the disk run below command.
#smartctl -s off /dev/sdb
To display details Smart info for the disk run below command.
#smartctl -a /dev/sdb // For IDE drive #smartctl -a -d ata /dev/sdb // For SATA drive
To begin, see what the drive details are:
[root@austin ~]# fdisk -l Disk /dev/sda: 250.0 GB, 250000000000 bytes 255 heads, 63 sectors/track, 30394 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Device Boot Start End Blocks Id System /dev/sda1 * 1 62 497983+ 83 Linux /dev/sda2 64 584 4184932+ 82 Linux swap / Solaris /dev/sda3 585 30390 239416695 82 Linux swap / Solaris
Now we know the single drive is sda. Also, you can usually identify which hard disks are on your system by
looking in /proc/ide and in /proc/scsi.
# smartctl -i /dev/sda
root@austin ~]# smartctl -i /dev/sda smartctl 5.43 2012-06-30 r3573 [x86_64-linux-2.6.32-504.el6.x86_64] (local build) Copyright (C) 2002-12 by Bruce Allen, http://smartmontools.sourceforge.net === START OF INFORMATION SECTION === Model Family: Western Digital RE3 Serial ATA Device Model: WDC WD2502ABYS-18B7A0 Serial Number: WD-WCAT19910234 LU WWN Device Id: 5 0014ee 157014252 Firmware Version: 02.03B04 User Capacity: 250,000,000,000 bytes [250 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: Thu Nov 27 16:10:20 2014 MST SMART support is: Available - device has SMART capability. SMART support is: Enabled [root@austin ~]# smartctl -i /dev/sda smartctl 5.43 2012-06-30 r3573 [x86_64-linux-2.6.32-504.el6.x86_64] (local build) Copyright (C) 2002-12 by Bruce Allen, http://smartmontools.sourceforge.net === START OF INFORMATION SECTION === Model Family: Western Digital RE3 Serial ATA Device Model: WDC WD2502ABYS-18B7A0 Serial Number: WD-WCAT19910234 LU WWN Device Id: 5 0014ee 157014252 Firmware Version: 02.03B04 User Capacity: 250,000,000,000 bytes [250 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: Thu Nov 27 16:14:54 2014 MST SMART support is: Available - device has SMART capability. SMART support is: Enabled
Now, edit /etc/smartd.conf and add entries for your drives:
/dev/sda -d ata -H -m root /dev/sdb -d ata -H -m root
Turn the service on:
# chkconfig smartd on # service smartd start
The smartctl program also allows for you to view and test SMART attributes of a drive. You can quickly check the overall health of a drive by using:
# smartctl -H /dev/sda
smartctl can be used to initiate long and short tests for the drive. These should be run periodically to do quick, or full, self-tests of the drive:
# smartctl --test=short /dev/sda # smartctl --test=long /dev/sda # smartctl -a /dev/sda
More info : https://wiki.archlinux.org/index.php/S.M.A.R.T.