We have a Raid 5 setup with 36 GB drives, 3 drives with one online hot spare. We would like to replace all 36 GB with 72GB drives. Has anyone tried to replace a drive at a time and let the parity information build on the hot spare, once done move to the next and replace the next until all become 72 GB drivest? This solution sounds different I know but the question is has anyone done this? This would prevent rebuilding a server and doing a restore.