My God, the command is not working. I need to remove sdb1 from md0 so I can change it from a RAID10 to RAID1, and it simply ignores my command:
# mdadm /dev/md0 --fail /dev/sdb1 --remove /dev/sdb1
# cat /proc/mdstat
Personalities : [linear] [raid0] [raid1] [raid10] [raid6] [raid5] [raid4] [multipath]
md2 : active raid10 sdb3[1]
1868560128 blocks super 1.2 64K chunks 2 offset-copies [2/1] [_U]
bitmap: 94/446 pages [376KB], 2048KB chunk
md1 : active raid10 sdb2[1]
6297344 blocks super 1.2 64K chunks 2 offset-copies [2/1] [_U]
bitmap: 0/25 pages [0KB], 128KB chunk
md0 : active raid10 sdb1[1]
78654080 blocks super 1.2 64K chunks 2 offset-copies [2/1] [_U]
bitmap: 76/151 pages [304KB], 256KB chunk
unused devices: <none>
#
My system is half-converted and is now unbootable. What am I going to do?
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