KB450023 – How do I rebuild drive that has failed and has been hot swapped with a new one in my storage array

This assumes you have identified the drive (please see technical bulletin on identifying the drives in the storage array).

Remove failed drive:
mdadm –manage /dev/md0 –fail /dev/sdb1 ( Change md0 to your actual raid device – and change sdb1 to the actual drive in your system you are removing )

Then remove the drive from storage array

Add the drive to the array and run

Add new drive:
mdadm /dev/md0 –add /dev/sdc1 ( Change md0 to your actual raid device – and change sdc1 to the actual drive you are adding to your system )

This should be all you need to allow you to replace the drive and rebuild the array.