I woke up to a disk with read errors today. 

 

Here is what is on the disk smart error log:

ATA Error Count: 1
	CR = Command Register [HEX]
	FR = Features Register [HEX]
	SC = Sector Count Register [HEX]
	SN = Sector Number Register [HEX]
	CL = Cylinder Low Register [HEX]
	CH = Cylinder High Register [HEX]
	DH = Device/Head Register [HEX]
	DC = Device Command Register [HEX]
	ER = Error register [HEX]
	ST = Status register [HEX]
Powered_Up_Time is measured from power on, and printed as
DDd+hh:mm:SS.sss where DD=days, hh=hours, mm=minutes,
SS=sec, and sss=millisec. It "wraps" after 49.710 days.

Error 1 occurred at disk power-on lifetime: 58269 hours (2427 days + 21 hours)
  When the command that caused the error occurred, the device was active or idle.

  After command completion occurred, registers were:
  ER ST SC SN CL CH DH
  -- -- -- -- -- -- --
  40 41 00 00 00 00 00  Error: UNC at LBA = 0x00000000 = 0

  Commands leading to the command that caused the error were:
  CR FR SC SN CL CH DH DC   Powered_Up_Time  Command/Feature_Name
  -- -- -- -- -- -- -- --  ----------------  --------------------
  60 00 00 f8 83 3f 40 00  16d+08:16:05.319  READ FPDMA QUEUED
  60 00 00 f8 7f 3f 40 00  16d+08:16:02.537  READ FPDMA QUEUED
  60 b8 00 40 7d 3f 40 00  16d+08:16:02.536  READ FPDMA QUEUED
  60 d0 00 70 79 3f 40 00  16d+08:16:02.529  READ FPDMA QUEUED
  60 00 00 70 75 3f 40 00  16d+08:16:02.528  READ FPDMA QUEUED

 

Could someone please help me understand what this means? If this is critical enough to warrant a disk replacement. I recently had a lot of reads from and writes to this disk (and a few other ones) for converting FS from reiserfs to xfs. This disk was a reiserfs disk until last week, just converted it to xfs, I'm not sure if that is what caused this to have the error.

 

All help is appreciated. I am basically trying to understand whether I'm risking the disk failing so, should be prepared with a replacement, or is there anything I should do to prevent these errors.

Edited April 22, 20242 yr by abhi.ko

Please post the complete diagnostics.

12 minutes ago, JorgeB said:

Please post the complete diagnostics.

Sorry here you go. tower-diagnostics-20240422-1235.

It's also logged in the syslog as a disk problem, though the UNC @ LBA 0 doesn't make much sense, I would run an extended test on the disk.

1 hour ago, JorgeB said:

It's also logged in the syslog as a disk problem, though the UNC @ LBA 0 doesn't make much sense, I would run an extended test on the disk.

Thanks for taking a look, disabled spin down delay and just kicked an extended test off. Will report back once done.

It never completed I don't think. was stuck at 20% for over a day and then I refreshed the page, it shows a completed without error under Last SMART Test Result.

 

tower-diagnostics-20240423-1903.zipNew diagnostics attached.

SMART test passed so the disk should be OK for now, keep monitoring, you can also replace/swap cables to rule that out if more errors occur.

Thank You, just for learning purposes - what in the diagnostics file shows that SMART test passed for disk 9.

 

I do have another disk - disk 1 with udma crc errors which I think might be related to cables or the controller.

The SMART report for that disk, this part:

 

SMART Extended Self-test Log Version: 1 (1 sectors)
Num  Test_Description    Status                  Remaining  LifeTime(hours)  LBA_of_first_error
# 1  Extended offline    Completed without error       00%     58305         -