Hello,
Since you write that you are able to boot from the cdrom, I do not
understand why you are playing with a floppy image put on a disk, image
meant for floppy or floppy emulation (CDROM El Torito).
If I understand correctly, take the following steps:
1) Under Linux, with fdisk(8) flag the second partition to a Plan 9
dedicated one and make this partition the active one (so that the MBR
is already correct; Plan 9 will deal with
its space [partition chunk] and slightly with the MBR [and there may be
a bug] so the MBR is the thing shared and shall be saved). Flagging the
partition as active---GRUB doesn't care since it uses its menu---will
hopefully prevent the plan 9 disk/fdisk program from dealing with the
MBR;
2) Save the MBR somewhere on a USB or whatever (no need to reinstall
everything if something goes wrong with the MBR, just put back the MBR
everything else is untouched);
3) Boot from the cdrom with Plan 9 and install from there to the disk.
When you come to the boot method, select Plan 9 from disk (but don't
install the boot program from Plan 9, since you have already GRUB or
whatever). Since the Plan 9 partition has already been set to active,
the MBR should be left alone.
HTH
--
Thierry Laronde (Alceste) <tlaronde +AT+ polynum +dot+ com>
http://www.kergis.com/
Key fingerprint = 0FF7 E906 FBAF FE95 FD89 250D 52B1 AE95 6006 F40C
