Smart

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

• SMART ASC/ASCQ error codes and messages

Meaning of pre-fail=

Pending disk failure when equal to or lower than treshold value

LBA_of_first_error

• https://www.smartmontools.org/wiki/BadBlockHowto

 

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

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

Unavailable - device lacks SMART capability.

??

smartctl: unsupported scsi opcode

Try

smartctl -a -d scsi /dev/sdc