Testing Raid1 set-up: Failed hard disk

Dear experts, in order to simulate a drive failure in our environment running SLES 8 with Raid1 for the system disk (set-up via Yast2) we - plugged out one drive - shutdown the system ====> system is hanging - power off + booting ====> system is hanging during fsck cycle - power off + reconnection of the former disk =====> system came up successfully Any help, tips for a proper handling of this scenario are welcome especially if we have to insert a "new" disk! TIA, Rainer Blaes EADS ST, Bremen (Germany)