[ale] RAID1

[Christopher Fowler]

I've got 2 120GB drives under Linux raid.

hda:
1. Swap
2. Part of MD0

hdb
1. Swap
2. Part of MD0

hda has gone bad and I need to run hdb.  Since there were mirrored how
can I run hdb2 as root instead of part of a mirror.  Do I need to 
run a command?

Grub was on those drives and now grub refuses to boot.  I assume it
may be because grub should not really be part of a raid structure?

Chris