OK, I may be making some headway here.
sudo mdadm -D /dev/md0
/dev/md0:
Version : 1.2
Creation Time : Mon Jan 25 13:53:32 2021
Raid Level : raid0
Array Size : 30005334016 (27.94 TiB 30.73 TB)
Raid Devices : 4
Total Devices : 4
Persistence : Superblock is persistent
Update Time : Mon Jan 25 13:53:32 2021
State : broken, FAILED
Active Devices : 4
Working Devices : 4
Failed Devices : 0
Spare Devices : 0
Layout : -unknown-
Chunk Size : 512K
Consistency Policy : none
Number Major Minor RaidDevice State
0 259 2 0 active sync missing
1 259 1 1 active sync missing
2 259 0 2 active sync missing
3 259 3 3 active sync missing
Also tried sudo mdadm --run /dev/md0, but there was no output.
Is this repairable without wiping out the data and recreating the array?
