new disk results in boot problem

[nicals wahlgren <niclas.wahlgren@gmail.com>]

Normally I am using one sata disk, no problem to boot from it. (using 
amd64 and sid, kernel 2.6.21.2-amd64)
But when I add another sata or ide disk from old Debian systems the 
system ends up in initramfs.
BIOS still says it boots from original disk.

How do I keep the system to boot from original sata disk when adding 
more disks?

/Niclas