On 2026-09-12 11:22, Dan Ritter wrote:
Gary Dale wrote:
# cat /proc/mdstat
Personalities : [raid6] [raid5] [raid4] [raid0] [raid1] [raid10]
md0 : active raid6 sdc1[6] sdd1[5] sdb1[4]
3907011584 blocks super 1.2 level 6, 8k chunk, algorithm 2 [4/3]
[U_UU]
md1 : active raid6 sde2[7] sdc2[6] sdd2[5] sdb2[4]
3907021448 blocks super 1.2 level 6, 4k chunk, algorithm 2 [4/4]
[UUUU]
However I can't re-add the 4th partition (/dev/sde1) into the array. For
example (just some of the thing's I've tried):
# mdadm --manage /dev/md0 --add /dev/sde1 --force
mdadm: add new device failed for /dev/sde1 as 7: Invalid argument
mdadm: Cannot read superblock on /dev/sde1
# mdadm --zero-superblock /dev/sde1
mdadm: Unrecognised md component device - /dev/sde1
Does cat /proc/partitions show sde1 ?
Perhaps the disk has been renamed and you didn't notice.
-dsr-
Yes, And again, /dev/sde2 is participating in /dev/md1 so the disk is
recognized. Also, the disk is showing as healthy.
