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seemingly random disk dropouts - PSU?

Featured Replies

Hi there,

I have recently added a few more drives to my system and have now been struggling with seemingly random dropouts. The drives always seem to test fine, i re-insert them, the system rebuilds properly and then after a few days of good operation, a drive will randomly drop out. I have moved drives to new bays, replaced sata cables, etc... the problem still seems to reoccur.

In my forum searches it seems sometimes folks solve this randomness with a PSU replacement. I am curious if anyone here can have a look at my logs and see if the issue may be something else. This is just a home server for media sharing so nothing really critical but i would still like to avoid a worst case scenario.

Let me know if i can provide any other logs/details.

drive log most recent drive dropout.txt tera-bit-syslog-20260227-1704.zip tera-bit-smart-20260227-1105.zip

  • Community Expert

Do you by any chance use Power Splitters on the PSU cables to the drives?

  • Community Expert
35 minutes ago, darock999 said:

Let me know if i can provide any other logs/details.

Attach Diagnostics ZIP to your NEXT post in this thread.

  • Author
38 minutes ago, itimpi said:

Do you by any chance use Power Splitters on the PSU cables to the drives?

yes i have had to use a few power splitters...this is another reason i was thinking power may be the culprit.

  • Community Expert
2 minutes ago, darock999 said:

had to use a few power splitters

Ideally, no more than 4 disks per PSU cable. MOLEX-SATA power splitters are better than SATA-SATA power splitters.

  • Community Expert
28 minutes ago, darock999 said:

yes i have had to use a few power splitters...this is another reason i was thinking power may be the culprit.

In particular never split a PSU SATA connector more than 2-way or you are liable to get current dropouts. You can normally split a molex->SATA 4 way as the Molex connector can handle more current.

  • Community Expert
16 hours ago, darock999 said:

yes i have had to use a few power splitters...this is another reason i was thinking power may be the culprit.

While power issues are a concern, I would direct your attention to the controller falling over and the critical btrfs errors

@JorgeB what do you think?

  • Community Expert

There are no corruption errors detected in the pool so far, but there are in the Docker image, and the balance failed with this:

BTRFS error (device sdb1): read time tree block corruption detected

Write time corruption is the one that mostly suggests bad RAM, but read time can also be that, so, I would recommend running memtest, after that also recreating the Docker image and monitoring for new errors.

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