device map confusion

[ceb.dideas]

I'm experimenting (locally) with near duplication of a system for the purpose
of later installation onto a physically remote system. Grub is the boot
loader and is installed on the BIOS boot device - primary master (/dev/hda)
- and the duplicated system is now on the primary slave (/dev/hdb).

My primary system boots with : kernel (hd0,0)/kernel-2.6.15 root=/dev/hda3 

to boot the duplicate I tried to use : kernel (hd1,0)/kernel-2.6.15
root=/dev/hdb2

However I've discovered that (hd1,0) doesn't map to the boot partition of
hdb1.  Experientially found that (hd3,0) does and allows me to boot the
duplicate.

Initially grub-install /dev/hda only mapped fd0 and hd0.  I edited the
device map to include (hd1) /dev/hdb and re-ran grub-install which now maps
fd0,hd0 and hd1.  My (Gentoo P3-450) system contains a floppy and 4 EIDE
harddrives.

Am I doing something wrong (with grub) or something else?

Thanks,
Chris

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