Derek Ciesielski

I have a pretty much identical setup, although I threw a different mb/cpu in there. Running snapraid on ubuntu 22.04. Same SAS3 backplanes. 20+2 disks. I had upgraded from a Dell H310 (LSI 9211-8i) SAS2 HBA to the supermicro card, and saw my sync speeds go in the toilet, just like yours. I stumbled across the disk write-cache setting, and noticed all the disks under the new SAS3 HBA had it disabled (hdparm -W). Swapping back to the H310 card, hdparm shows all drives have write caching ENABLED. Sure...

I have a pretty much identical setup, although I threw a different mb/cpu in there. Running snapraid on ubuntu 22.04. Same SAS3 backplanes. I had upgraded from a Dell H310 (LSI 9211-8i) SAS2 HBA to the supermicro card, and saw my sync speeds go in the toilet, just like yours. I stumbled across the disk write-cache setting, and noticed all the disks under the new SAS3 HBA had it disabled (hdparm -W). Swapping back to the H310 card, hdparm shows all drives have write caching ENABLED. Sure enough, force...