- /dev/sda – ok disk
- /dev/sdb – failed disk, to be replaced
Remove failed disks from the array
mdadm --manage /dev/md0 --remove /dev/sdb1
Add new disk
Create the exact same partitioning as on /dev/sda.
sfdisk -d /dev/sda | sfdisk /dev/sdb
Add disk to mdx arrays
mdadm --manage /dev/md0 --add /dev/sdb1
Let it sync, then add bootloader to disks
# grub grub> find /grub/stage1 (hd0,0) (hd1,0) grub> device (hd0) /dev/sda grub> root (hd0,0) grub> setup (hd0) grub> device (hd0) /dev/sdb grub> root (hd0,0) grub> setup (hd0)
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