I have only one hard drive installed.
/etc/fstab contains this
LABEL=/ / ext2 usrquota,grpquota 1 1
LABEL=/boot /boot ext2 defaults 1 2
/dev/cdrom /mnt/cdrom iso9660 noauto,owner,ro 0 0
/dev/fd0 /mnt/floppy auto noauto,owner 0 0
none /proc proc defaults 0 0
none /dev/pts devpts gid=5,mode=620 0 0
/dev/hda5 swap swap defaults 0 0
I still wonder, there are no problems boot'ing from SME 5.5 installation CD and from the previously installed SMe 5.5.
Only the SME 5.6 installation causes trouble.