Hi All,

 

Hoping you can help...scanned the forums and tried everything I can think of. Doing a parity-sync after replacing a parity drive with a bigger disk.

 

Currently getting 16MB/s and an estimated 11 days to complete the sync.

 

So far - replaced SATA cables, changed controller, reseated power and sata cables on both ends, changed a HD tunable (md_num_stripes) from default to 4096 (server has 32GB RAM) and installed the "fix common problems" and "tips and tweaks" plugins to see if they gave me anything.

 

Any ideas? I've attached diagnostics.

tower-diagnostics-20231212-1723.zip

Those diagnostics appear to be just after booting.    It would be a good idea that have a set after the (slow) parity check has been running for a while to see if it shows something.

 

Have you tried using something like the DiskSpeed docker to check the performance of your drives and disk controllers?

Just ran the diskspeed docker and as far as I can see everything looks normal - drives are performing close to each other in specification - no one drive is exclusively showing slow.

 

Attached diags again after parity check was running for about 40 minutes. If that isn't enough time, happy to post again after much more time...

tower-diagnostics-20231212-1810.zip

Dec 12 09:56:23 Tower kernel: mdcmd (37): nocheck pause
Dec 12 09:56:24 Tower kernel: md: recovery thread: exit status: -4

 

Check was paused when the diags were saved.

Arrghh...sorry...think I hit the pause button when I was doing the diskspeed checks

Been running for an hour now since I unpaused...diags below. Sorry again - such a silly mistake.

tower-diagnostics-20231212-1911.zip

Nothing obvious, could be parity disk is slow at writing, diskspeed only tests read speed.