On Tue, 15 Nov 2022 14:58:56 -0800 John Jason Jordan <joh...@gmx.com> dijo:
>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? I did some searching and found several suggestions involving mdadm commands, but the suggestions just offered the commands with no explanation of what the command does, nor could I find clear and understandable explanations on the man page. For example, one suggestion used the mdadm command 'assemble,' and when I looked in the man page it said 'use assemble to assemble the raid.' Using the term to define the term is a useless pleonasm. In the end I closed down all running programs and then shut down the computer. When I rebooted everything was running as it should, including the RAID. In the year and a half since I bought the drives and set up the RAID this is at least the fifth time that the RAID has failed while in use. In each case a mere reboot cured the problem. But I have to say that the next time I need to set up a RAID mdadm will be my last choice.
