Are you saying two different drives in one box? One has to be set to slave and
the other master. Please check the jumpers on the HD to insure that one is slave
and one is master. Most like the boot grub would be on the master drive. I did
have to use gparted to mount my second HD. I Upgraded from a 40 gig to 180 gig
and transfered all my data to the second drive