Basically I have raid 5 with three disks that are 2TB each. I bought 2 extra 2TB drives however they are few sectors smaller on a newer model - old drives are no longer sold.
When I issue
/dev/md0 --add /dev/sde /dev/sdf
mdadm: /dev/sde not large enough to join array.
Is there any way to resize the first three disks without losing data in order for the smaller sector drives to be added?