HI I've got a new build and the parity check speed seems extremely slow compared to what i've seen on others. I'm only getting 9MB/s on a 6TB drive at best. It's going to take 8 days to complete.

 

 

 

biernas-diagnostics-20240213-1013.zip

There appears to be something else reading from multiple disks, stop all services/plugins.

I put it in maintenance mode and restarted the sync. No speed difference. I'm having a recurring issue with the drives going unmounted: partition layout  after reboot as well. I've changed out HBA cards, mobo, processor, RAM. Not sure what else to try at this point. Cabling, drives, or the HBA model I guess.

Run the diskspeed docker test to see if all disks are performing normally.

Didn't get a chance to run the diskspeed check. However, after some troubleshooting it's appearing to be a cabling issue. I pulled power from the top 4 drives and the parity-sync hit 130MB/s. Thinking it was the SATA power splitter I pulled that and just ran power off the remaining PSU cables... but the sync dropped back down to 9MB/s. I guess the next thing to try is swapping out the Mini SAS cable feeding those 4 drives.

Problem with the SATA cable would usually leave traces on the log, but you can try.

I talked to some people that are using the Adaptec HBA card and having issues as well so I'm going to swap to an LSI model.

Swapped to LSI card and problems are gone. Full 200+MB/s sync and formatting worked way faster too.  I wouldn't recommend anyone run an Adaptec card after my experience.