mdadm array - auto read only - resync pending

# cat /proc/mdstat 
Personalities : [raid1] 
md127 : active (auto-read-only) raid1 sde1[1] sdf1[0]
      976630336 blocks super 1.2 [2/2] [UU]

This can happen if you have newly assembled a RAID Array or created an array that exists in mdadm database, although, wasn't active before. A restart or something else trigerred it to reappear.

To fix this, just type --readwrite with mdadm on the md array:

mdadm --readwrite /dev/md127
  • mdadm, soft raid, linux, centos, rhel, software raid
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