Hi all,

I've tried searching for answers for this and troubleshooting myself, but continue to have this issue across any/all versions of Unraid.

If I have an unclean shutdown (which Unraid nearly always tells me I did even when I do a fully clean shutdown/reboot), my parity check becomes painfully slow (in the kb/s range). The only fix is to unseat/reseat my sata cables on my mobo.

Turning all Dockers and plugins off doesn't solve the issue, nor does starting in maintenance mode.

If (after unseating/re-seating the cables) my server is running for days/weeks/months without a shutdown/reboot, parity check will continue to work as expected with reasonable speeds, but as soon as I have a shutdown/reboot for any reason, I'm back to the ultra slow speeds until I re-seat the sata cables.

I initially thought it might be an issue with the disks so I tried swapping them out for new ones but the problem persists. I found a short reddit thread where people seem to have the same problem and require the same temporary fix.

Does anyone have any advice on how I can permanently fix this? Would it be an issue with my mobo? BIOS? I'm out of ideas at this point.

Thanks in advance!

Post the diagnostics during a slow check.

Quick update: I installed a new PSU and it solved all my problems!