On Wed, Jan 9, 2019 at 11:33 AM stakanov
# cat /proc/mdstat Personalities : [raid1] md127 : active raid1 sdc1[0] 976760640 blocks super 1.0 [2/1] [U_] bitmap: 8/8 pages [32KB], 65536KB chunk
unused devices: <none>
...
When things go South on you for unknown reasons, the active disc is sdd1 instead.
Both should be the same….but aren’t. Sdd1 should not be named as unused in yast when sdc1 is used. And sdc1 and sdd1 should not flip within the RAID and should contain the very same information. What is wrong here? I do not understand.
It is obvious that now your RAID1 consists of single disk. Even if you repeat "should be the same" million times it is not going to change anything. You need to add second disk to RAID to fix it. mdadm --manage /dev/md127 --add /dev/sdd1 or whatever your second partition is. To be on safe side (because it is not clear in which state second partition is) I'd probably perform wipefs on this partition so it adds it as new and performs full copy. And no, I do not know how it happened. Apparently at some point you booted with only disk present. You did it two times, with two different disks. It resulted in removing second array member from each disk. At this point you had two disks each believing it is the only valid member of the same array. From now on it was the matter of which disk was detected first on boot. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org