mdadm "auto-read-only" Linux Software RAID solution

If you have the "(auto-read-only)" beside an arrayI have no idea why that happens but it is easy to fix.

Just run "mdadm --readwrite /dev/md1" (rename md0 to the device with the problem and it will begin to resync.

md1 : active (auto-read-only) raid1 sdb2[0] sda2[1]
19534976 blocks [2/2] [UU]
resync=PENDING

md0 : active raid1 sda1[2] sdb1[0]
488287488 blocks [2/1] [U_]
[>....................] recovery = 1.9% (9341504/488287488) finish=302.1min speed=26421K/sec

unused devices:
# cat /proc/mdstat
# mdadm --readwrite /dev/md1
# cat /proc/mdstat
Personalities : [raid1]
md1 : active raid1 sdb2[0] sda2[1]
19534976 blocks [2/2] [UU]
resync=DELAYED
md0 : active raid1 sda1[2] sdb1[0]
488287488 blocks [2/1] [U_]
[>....................] recovery = 1.9% (9677184/488287488) finish=302.5min speed=26368K/sec

unused devices:


Tags:

mdadm, auto, linux, software, raid, solutionif, quot, array, readwrite, dev, md, rename, resync, active, sdb, sda, uu, pending, u_, min, unused, devices, proc, mdstat, personalities, delayed,

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