Sorry to necro bump but I seem to be having the same issue, I've double checked in my bios for my pcm setting for my card that sas drives are all enabled for write cache. I've gone through the three drives with
sdparm -g WCE
saw that all 3 were disabled, set the cache to enable, and verified with sdparm again, all three drives now show
WCE 1 [cha: y, def: 0, sav: 1]
Rebooted, and still getting the same slow ~15MB/s. Verified primary storage for new files is set to cache, secondary storage as array. I can see the cache drive filling up, and then things move over to the array when i use the mover as a manual task. My cache is a 2tb NVME. Something has to be setup wrong, any info or guidance here?
burnside-diagnostics-20250104-1720.zip