Why does not update-grub detect Fedora 13 installation?

[H.S.]

On 12/07/10 01:42 PM, Rick Stevens wrote:
> 
> 
> /dev/sdc5 is an extended partition.  IIRC, update-grub only checks
> primary partitions--primarily because your BIOS can't boot anything in
> an extended partition, either.

hmm .. then why does it detect OSes on my LVM volumes? I don't think
BIOS can boot from an LVM volume, can it?


Also, among the other OSes it detected on my system, here are a couple
of counter examples:
--------------------------------------------------
menuentry "Debian, with Linux 2.6.32-100601-1394 (on /dev/sdc6)" {
        insmod part_msdos
        insmod ext2
        set root='(/dev/sdc,msdos5)'
        search --no-floppy --fs-uuid --set
9db23921-b7bc-4f1f-8b31-306f2126af0e
        linux /vmlinuz-2.6.32-100601-bijli-1394
root=UUID=0300e89b-ae92-43f5-b1f0-0d53c2b589ca ro vga=792 quiet
        initrd /initrd.img-2.6.32-100601-bijli-1394
}
menuentry "Fedora release 9 (Sulphur) (on /dev/sdc13)" {
        insmod part_msdos
        insmod ext2
        set root='(/dev/sdc,msdos13)'
        search --no-floppy --fs-uuid --set
3cfc63bf-9e84-49a3-90ad-3fa623141200
        linux /boot/vmlinuz-2.6.26.6-79.fc9.i686 root=/dev/sdc13
}
--------------------------------------------------

Both logical partitions.

Besides, I don't think BIOS is booting from the partitions at all on my
system. It just checks the mbr of sdc, which is set by grub, and the
computer gets pointed to my /boot partition where vmlinuz continues to
boot. Isn't that broadly what happens?


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