Hello,

it has been quite some time that I have a lot of issues with my server. there almost always are new read errors when parity checking.
If I change the sata cable it works for one or two week and it comes back. It was mostly on disk 5, even with new cables and a new disk.

and here is my last parity check :

I attached diagnostics as well.

I tried numerous new cables, I added sata expansion cards in case in was the internal MB sata ports that were failing, and I've no clues anymore on what to do except that I don't trust my server anymore.
Could it be power supply related ?

Thanks in advance for your help.

nastorm-diagnostics-20260608-0900.zip

There are multiple disks dropping across different controllers, suggesting more of a power issue; it could be the PSU itself, or if there are any splitters being used, it could also be related to that

Thanks,
Yep I have multiple splitters, as the PSU doesn't have lot of this kind of power output and I have 10 disks.
Are there good practices recommanded here ?
Or maybe specific PSUs with more disk outputs ?

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

What is the exact model of your PSU?

And never split one SATA port into more than two.

Okay, I'm pretty sure I have some disk on a 1 to 4 sata splitter.
I'll unmount the power supply to check what it is.

57 minutes ago, xoC said:

1 to 4 sata splitter

If you don't have more than 4 drives per PSU cable, It is OK to split MOLEX to 4 SATA, just don't split SATA to more than 2 SATA. Better to avoid SATA-SATA splitters.