I'm running mergerFS + snapRAID for the first time. I have 12 drives running on an LSI 9305 16i HBA. 10 are data drives (a mix of 4TB and 5TB drives) in a mergerFS union, and 2 are parity drives. I'm running proxmox & a VM (ubuntu server) that handles mergerFS and snapRAID.
I just transferred about 31TB from my old NAS to this new server. Transfer went fine. But now I'm trying to run snapraid sync, and as soon as the process starts, I see ~150MB/s, ~58 stripes/s, CPU 2%, ~67:00 ETA.
But after about 5 minutes of normal progress the speed starts to fall steadily. After a couple more minutes, it's down to 30MB/s.
The final chart (after I terminate it) always says it's waiting on my parity 1 disk, but I don't really know how to troubleshoot it from here.
NOTE: I actually just noticed that it seems to be exactly when it crosses the threshold of 60000 MB. I've run 2 repeat tests now, and the speed drops *exactly* when it hits that number. What could that possibly indicate?
Any help would be appreciated. I dumped a bunch of time and money into this new server, so if my wife doesn't see notable improvements in plex pretty soon, I'm dead...