Replace mdadm
From Karmaking
1. Mark faulty drive as "failed": mdadm --fail /dev/md1 /dev/sdb1 2. Remove drive: mdadm --remove /dev/md1 /dev/sdb1 3. Add new partitions to arrays: mdadm --add /dev/md0 /dev/hdc1
1. Mark faulty drive as "failed": mdadm --fail /dev/md1 /dev/sdb1 2. Remove drive: mdadm --remove /dev/md1 /dev/sdb1 3. Add new partitions to arrays: mdadm --add /dev/md0 /dev/hdc1