Latest revision as of 13:02, 16 April 2024

Disk monitoring

Links

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

where 11 would be disk id (DID)

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

191 G-Sense_Error_Rate

Vibrations or shocks

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

With working smart support

rtl9210 like the DELOCK 64198

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

Non-medium error count

CRC errors, could be cable or controller

@@ Line 3: / Line 3: @@
-== Links ==
+= Links =
 *[https://www.smartmontools.org/wiki/ Smartmontools wiki]
 *[https://en.wikipedia.org/wiki/S.M.A.R.T. Wikipedia article]
 *[https://wiki.unraid.net/Understanding_SMART_Reports Understanding SMART reports]
 *[https://www.thomas-krenn.com/en/wiki/SMART_tests_with_smartctl https://www.thomas-krenn.com/en/wiki/SMART_tests_with_smartctl]
 *[https://www.thomas-krenn.com/en/wiki/Smartmontools_with_MegaRAID_Controller Smartmontools with megaraid]
 *[https://wiki.archlinux.org/index.php/S.M.A.R.T https://wiki.archlinux.org/index.php/S.M.A.R.T].
+*[https://www.smartmontools.org/wiki/FAQ smartmontools FAQ]
+*[https://www.backblaze.com/blog/hard-drive-smart-stats/ Smart hard drive stats]
+*[https://www.ibm.com/docs/en/flashsystem-v7000u/1.5.2?topic=problems-smart-ascascq-error-codes-messages Smart ASC error codes]
 = Tools =
@@ Line 17: / Line 20: @@
 *gsmartcontrol
+&nbsp;
 = Useful commands =
@@ Line 29: / Line 32: @@
   smartctl -a /dev/sda
-&nbsp;
+== check smart status of disk in raid array ==
+Something like
+ smartctl -a /dev/bus/0 -d sat+megaraid,11
+where 11 would be disk id (DID)
 == check error log ==
@@ Line 35: / Line 41: @@
   smartctl -l error /dev/sdb
 == Device: /dev/bus/0 [megaraid_disk_09] [SAT] ==
 Try
   smartctl --scan
+&nbsp;
+&nbsp;
 = Some codes and messages =
+*[https://www.ibm.com/docs/en/flashsystem-v7000u/1.5.2?topic=problems-smart-ascascq-error-codes-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 ==
@@ Line 60: / Line 77: @@
 Check&nbsp;[https://medium.com/@satyeshukumar/how-to-fix-uncorrectable-sector-count-warning-5a38c56d3faf https://medium.com/@satyeshukumar/how-to-fix-uncorrectable-sector-count-warning-5a38c56d3faf]
-=== 198 Offline Uncorrectable ====
+== 198 Offline Uncorrectable ==
 bad sign, on ssd mostly/only when number gets high
+&nbsp;
+== SSD specific ==
+*[[https://unix.stackexchange.com/questions/106678/how-to-check-the-life-left-in-ssd-or-the-mediums-wear-level https://unix.stackexchange.com/questions/106678/how-to-check-the-life-left-in-ssd-or-the-mediums-wear-level]
+*[https://www.compuram.de/blog/en/the-life-span-of-a-ssd-how-long-does-it-last-and-what-can-be-done-to-take-care/ Life span of SSD]
+*[https://lowendtalk.com/discussion/141041/is-my-server-ssd-disk-healty Is my SSD disk healthy?]
+=== 191 G-Sense_Error_Rate ===
+Vibrations or shocks
+=== 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
+====With working smart support====
+rtl9210 like the DELOCK 64198
+=== 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
+&nbsp;
+== 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
+==Non-medium error count==
+CRC errors, could be cable or controller

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