[bug #34564] `grub_bios-install` fails with `/bin/grub-mkimage: error: prefix is too long.`

[C Anthony Risinger]

URL:
  <http://savannah.gnu.org/bugs/?34564>

                 Summary: `grub_bios-install` fails with `/bin/grub-mkimage:
error: prefix is too long.`
                 Project: GNU GRUB
            Submitted by: xtfxme
            Submitted on: Sun 16 Oct 2011 09:44:41 AM GMT
                Category: Installation
                Severity: Major
                Priority: 5 - Normal
              Item Group: Software Error
                  Status: None
                 Privacy: Public
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 
                 Release: other
         Reproducibility: Every Time
         Planned Release: None

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Details:

i use full UUIDs as both VG and LV names, eg:

/dev/mapper/40ba05004b58c5e5b6e6b8b30000044b-effdfe048c0b40279a1a67a8732926a7

... because of this, `grub_bios-install` fails with:

/bin/grub-mkimage: error: prefix is too long.

... and the image is never created.  actual command being executed is:

/bin/grub-mkimage -d /usr/lib/grub/i386-pc -O i386-pc --output=core.img
--prefix='(40ba05004b58c5e5b6e6b8b30000044b-effdfe048c0b40279a1a67a87329)/grub'
biosdisk ext2 part_gpt part_gpt raid mdraid1x lvm

(strace) execve("/bin/grub-mkimage", ["/bin/grub-mkimage", "-d",
"/usr/lib/grub/i386-pc", "-O", "i386-pc", "--output=/grub/core.img",
"--prefix=(40ba05004b58c5e5b6e6b8b30000044b-effdfe048c0b40279a1a67a8732926a7)/grub",
"biosdisk", "ext2", "part_gpt", "part_gpt", "raid", "mdraid1x", "lvm"], [/* 30
vars */]) = 0

... setup for all non-swap partitions is GPT -> MDRAID -> LVM -> EXT4




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