[bug #27920] BIOS-type computer with GPT bootdisk doesn't find filesystem(s) on another disk which is MBR/msdos type

[Sami Olmari]

URL:
  <http://savannah.gnu.org/bugs/?27920>

                 Summary: BIOS-type computer with GPT bootdisk doesn't find
filesystem(s) on another disk which is MBR/msdos type
                 Project: GNU GRUB
            Submitted by: olmari
            Submitted on: Tue 03 Nov 2009 07:23:47 AM GMT
                Category: Disk &amp; Partition
                Severity: Major
                Priority: 5 - Normal
              Item Group: None
                  Status: None
                 Privacy: Public
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 
                 Release: 1.97
         Reproducibility: Every Time
         Planned Release: None

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Details:

I have amd64 computer which is obviously BIOS-based system, then mine boot
harddisk is GPT-type. All works well with this so far, but I also have
secondary HD that is MBR/msdos type, which has Windows in there.

30_osprober script finds the drive/partitions and generates nice menuitem for
it, but grub throws error about couldn't find uuid xxxxxxxx, thus not working
menuitem.

ls -l at grub commandline shows there is hd1 but like it would contain
nothing.

Solution is to add "GRUB_PRELOAD_MODULES=part_msdos" into /etc/grub/default
so grub will load that module at boot time, which in turn will make the
secondary msdos-type disc usable again.

Maybe this "GPT-bootdisc in BIOS-computer" is rather rare configuration, but
nevertheless would be great if this type of feature would work "out of box"




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