[ Thanks to Falko
Timme for this link. ]
“This guide shows how to remove a failed hard drive from a Linux
RAID1 array (software RAID), and how to add a new hard disk to the
RAID1 array without losing data…“In this example I have two hard drives, /dev/sda and /dev/sdb,
with the partitions /dev/sda1 and /dev/sda2 as well as /dev/sdb1
and /dev/sdb2…”