Trouble Rebuilding AppleRAID
I have a Mac Pro 2010 with two boot drives and two 3TB storage drives set up as a mirrored RAID. One of the two storage drives died, so I replaced it. However, the computer suffered a hardware failure as I was rebuilding the RAID, and although I repaired the computer, I can't seem to rebuild the RAID.
When booted into Snow Leopard, Disk Utility lists the RAID as degraded, the old drive as a working slice, and the new drive as a failed slice. Trying to select the RAID or the failed slice will make Disk Utility freeze/beachball.
When booted into High Sierra, Disk Utility never advances beyond the "Loading Disks" screen.
Using the "diskutil ar repairMirror <Raid-Name> <diskNsM>" command in Terminal will update the new disk from "Failed" to "0% (Rebuilding)" only for it to return to "Failed" shortly thereafter.
Note that I can still access the data (because the RAID has one working slice) and I have everything backed up to an external drive just in case I lose everything.