Smart
Disk monitoring
Links
- Smartmontools wiki
- Wikipedia article
- Understanding SMART reports
- https://www.thomas-krenn.com/en/wiki/SMART_tests_with_smartctl
- Smartmontools with megaraid
- https://wiki.archlinux.org/index.php/S.M.A.R.T.
- smartmontools FAQ
- Smart hard drive stats
- Smart ASC error codes
Tools
- smartctl
- gsmartcontrol
Useful commands
enable smart
smartctl -i /dev/sda
check smart status
smartctl -a /dev/sda
check smart status of disk in raid array
Something like
smartctl -a /dev/bus/0 -d sat+megaraid,11
check error log
smartctl -l error /dev/sdb
Device: /dev/bus/0 [megaraid_disk_09] [SAT]
Try
smartctl --scan
Some codes and messages
Meaning of pre-fail=
Pending disk failure when equal to or lower than treshold value
LBA_of_first_error
Device is: Not in smartctl database [for details use: -P showall]
Try
/usr/sbin/update-smart-drivedb
otherwise check out https://www.smartmontools.org/wiki/FAQ#MyATASATAdriveisnotinthesmartctlsmartddatabase
Uncorrectable Sector Count
Check https://medium.com/@satyeshukumar/how-to-fix-uncorrectable-sector-count-warning-5a38c56d3faf
198 Offline Uncorrectable
bad sign, on ssd mostly/only when number gets high
SSD specific
- [https://unix.stackexchange.com/questions/106678/how-to-check-the-life-left-in-ssd-or-the-mediums-wear-level
- Life span of SSD
- Is my SSD disk healthy?
231 SSD_Life_Left
Percentage of life left
232 Available Reserved Space
Number of physical erase cycles completed on the SSD as a percentage of the maximum physical erase cycles the drive is designed to endure.
Intel SSDs report the available reserved space as a percentage of the initial reserved space.
233 Media Wearout Indicator
Decreases down to 1, then start hoping. It might still last a while.
241 Lifetime_Writes_GiB
Amount of data written so far
SSD/nVME and USB adapters
Seemingly not supported: /dev/sdb: Unknown USB bridge [0x152d:0x2578 (0x117)] Bus 002 Device 002: ID 152d:2578 JMicron Technology Corp. / JMicron USA Technology Corp. USB to ATA/ATAPI Bridge Try:
smartctl -a -d sat /dev/sdb
smartd: Failed SMART usage Attribute
Might be yelling about a disk that's already been replaced, try restarting smartd
Error: UNC at LBA = 0x00113cd8 = 1129688
Uncorrectable LBA error, throw away
FAQ
Wear level
Wear level on nvme
There's percentage used:
High = bad
and available spare:
Low = bad
List disks
smartctl --scan
A mandatory SMART command failed: exiting. To continue, add one or more '-T permissive' options.
meh
Device: /dev/bus/0 [megaraid_disk_09] [SAT], failed to read SMART Attribute Data
Controller probably doesn't allow smart, it also seems to happen when drive is hot spare on megamaid controller.
FAILURE PREDICTION THRESHOLD EXCEEDED [asc=5d, ascq=0]
time to replace disk?
/dev/sdc: Unknown USB bridge
Smart over USB usually doesn't do much, try
smartctl -a -d scsi /dev/sdc
to get some information
??
smartctl: unsupported scsi opcode
Try
smartctl -a -d scsi /dev/sdc
