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→Replace Failed Drive
* Remove the failed drive
* Remove the failed drive
mdadm /dev/md0 --remove /dev/sda
mdadm /dev/md0 --remove /dev/sda
* Add it again
mdadm --manage /dev/mdN -a /dev/sdd1
If a RAID is operated with a spare disk, it will jump in for the disk set to faulty. A rebuild is performed automatically. The disk set to faulty appears in the output of mdadm -D /dev/mdN as faulty spare.
To put it back into the array as a spare disk, it must first be removed using
mdadm --manage /dev/mdN -r /dev/sdX1
and then added again
mdadm --manage /dev/mdN -a /dev/sdd1
root@morpheus:~# ls /dev/mapper/
root@morpheus:~# ls /dev/mapper/
control lvm-music lvm-transmission lvm-video
control lvm-music lvm-transmission lvm-video