new hard drive

[Kudret Güler <kudrettin@gmail.com>]

Hi all, yesterday I had only one hard drive.
hda1 /      #debian installation A
hda5 /home

Today this hard drive is hdb with the same structure. On hda there is
grub installed pointing to debian installation A as well as other
entries. When I try to load debian installation A, currently I am
having kernel panic after an error: "VFS can't find ext3 filesystem on
dev hda1"

Question: Which files should I edit to let linux know that it is on hdb now?
I already edited fstab and mtab
thank you