Hi all, I thought to have tested this a while ago but I guess not. I have a Centos 5.3 system (call its SYSA) software raid 0, 2 disks. I have an identical system (SYSB) else were, so I pull one of my mirrors drives from SYSA and put it in SYSB as the only drive in SYSB. Upon but I get grub error. I boot in recuse mode (CD, linux rescue) and it attempts to mount the disk, but claims no partitions exists. I drop into a shell and mount it w/o issues. Running fdisk on the drive tells me its got 2 partitions which is true. I set this up as ext3, no LVMs, etc... with root and the other partition being swap. I've always thought that all I can do in the event of motherboard failure os to have a duplicate system around and merely move a dive off to it. - aurf