hank peng <pengxihan@xxxxxxxxx> writes:
> Only one of disks in this RAID1failed, it should continue to work with
> degraded state.
> Why LVM complained with I/O errors??
That is because the last drive in a raid1 can not fail:
md9 : active raid1 ram1[1] ram0[2](F)
65472 blocks [2/1] [_U]
# mdadm --fail /dev/md9 /dev/ram1
mdadm: set /dev/ram1 faulty in /dev/md9
md9 : active raid1 ram1[1] ram0[2](F)
65472 blocks [2/1] [_U]
See, still marked working.
MfG
Goswin
PS: Why doesn't mdadm or kernel give a message about not failing?
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