Small ATA error count increases without any other issues

TrueNAS General
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1

One of my disks is experiencing strange errors.

Here’s the latest output of smartctl -x:
smart_sdf.txt (17.2 KB)

Here are the (imho) most important facts:

  • TOSHIBA MG09ACA18TE
  • Power On Hours: 18083
  • No reallocated or pending sectors
  • No errors in any SMART tests
  • No ZFS errors

On 2025-05-25 02:23 I received a warning, that the ATA error count increased from 0 to 1.
Today, on 2025-06-16 02:23 I received a second one with the counter increased to 2.

I have tasks for SHORT smart test to run every day at 00:00, LONG tests at 02:00 of the first day of each month and the pool gets scrubbed each month with the last run on 2025-05-19 - so no correlation for any of those tasks with the errors.

Here’s the smartctl output concerning the ATA errors:

Error 2 [1] occurred at disk power-on lifetime: 18076 hours (753 days + 4 hours)
  When the command that caused the error occurred, the device was active or idle.

  After command completion occurred, registers were:
  ER -- ST COUNT  LBA_48  LH LM LL DV DC
  -- -- -- == -- == == == -- -- -- -- --
  04 -- 51 00 0b 00 00 00 00 00 00 00 00  Error: ABRT

  Commands leading to the command that caused the error were:
  CR FEATR COUNT  LBA_48  LH LM LL DV DC  Powered_Up_Time  Command/Feature_Name
  -- == -- == -- == == == -- -- -- -- --  ---------------  --------------------
  b0 00 d5 00 01 00 00 00 c2 4f e1 00 00 44d+12:40:50.557  SMART READ LOG
  b0 00 d5 00 01 00 00 00 c2 4f e1 00 00 44d+12:40:50.557  SMART READ LOG
  b0 00 d6 00 01 00 00 00 c2 4f e0 00 00 44d+12:40:50.556  SMART WRITE LOG
  b0 00 d6 00 01 00 00 00 c2 4f e0 00 00 44d+12:40:50.556  SMART WRITE LOG
  b0 00 d5 00 01 00 00 00 c2 4f e0 00 00 44d+12:40:50.555  SMART READ LOG

Error 1 [0] occurred at disk power-on lifetime: 17548 hours (731 days + 4 hours)
  When the command that caused the error occurred, the device was active or idle.

  After command completion occurred, registers were:
  ER -- ST COUNT  LBA_48  LH LM LL DV DC
  -- -- -- == -- == == == -- -- -- -- --
  04 -- 51 00 0b 00 00 00 00 00 00 00 00  Error: ABRT

  Commands leading to the command that caused the error were:
  CR FEATR COUNT  LBA_48  LH LM LL DV DC  Powered_Up_Time  Command/Feature_Name
  -- == -- == -- == == == -- -- -- -- --  ---------------  --------------------
  b0 00 d5 00 01 00 00 00 c2 4f e1 00 00 22d+12:40:41.064  SMART READ LOG
  61 00 20 00 00 00 01 3f 92 39 d8 40 00 22d+12:40:41.063  WRITE FPDMA QUEUED
  b0 00 d6 00 01 00 00 00 c2 4f e0 00 00 22d+12:40:41.057  SMART WRITE LOG
  61 00 10 00 00 00 00 ef 4b 34 10 40 00 22d+12:40:41.056  WRITE FPDMA QUEUED
  b0 00 d6 00 01 00 00 00 c2 4f e0 00 00 22d+12:40:41.056  SMART WRITE LOG

No my question is: Does anyone have any idea what could cause these errors at exactly the same time of the day and even more important: should I worry about the disk?

2

Afaik those errors shouldn’t be strictly related to disk sanity, but they occurs if there are some problem between disk and controller.
The first thing i would try in your place, if possible, Is to change the SATA cable (or at least, reseat It) on the disk that Is raising the error; also, if Is possible, try to improve a bit the airflow in the case and on the disk itself (i see 51° as max temp, if reached for long time, Is quite high IMHO)

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3

Thanks, that doesn’t sound so bad.
I did have some temperature problems when I used a different case but the drives are now cooled quite well and also monitored:

image
image798×459 32.8 KB

I’ll use another cable when I open up the NAS the next time, the issue doesn’t seem very pressing and there are still some unused cables hanging off my HBA…

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