How could this mistake have been avoided?
paranoid version: bios disabled or physically unplug Zin HD
use HD of different size
Backup whole partition with dd
Identify which HD is which with a live distro for example, hda, hdb and write it down (hint Use fdisk -l)
label one of the HD may help (e2label? see man e2fsck at the end)
Also, quickly, SUSE 10.0 has an error which shows the wrong kernel assigned to modprobe (I was trying to install wireless drivers using ndiswrapper).
Either boot from another kernel
modinfo ndiswrapper to know which one
or compile from source (probably better newer version