Phil Schaffner wrote: > I have attempted to address all comments: > > http://wiki.centos.org/HowTos/SoftwareRAIDonCentOS5 > > Give me your best shot! :-D > > Phil > Nice job Phil :) /remembering my disclaimer/ I'm not a raid/grub expert... Presumably Section two is required because grub is installed to the mbr of /dev/sda so /dev/sdb isn't bootable in the event /dev/sda should fail? Would using grub be simpler rather than directly editing /boot/grub/device.map ? Something like... Following on from Section 1, reboot... Stop at the grub menu and enter the "c" option, which gives you the grub prompt. Then: grub> device (hd0) /dev/sda grub> root (hd0,0) grub> setup (hd0) grub> device (hd1) /dev/sdb grub> root (hd1,0) grub> setup (hd1) grub> exit and test both disks are bootable. Achieves the same thing I guess.