bugGNU GRUB - Bugs: bug #39591, grub-mkconfig fails on btrfs raid


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bug #39591: grub-mkconfig fails on btrfs raid

Submitted by:  Florian Scandella <fscan>
Submitted on:  Sun Jul 28 15:29:53 2013  
Votes:  100  
Category: ConfigurationSeverity: Major
Priority: 5 - NormalItem Group: Software Error
Status: FixedPrivacy: Public
Assigned to: NoneOriginator Name: 
Open/Closed: ClosedRelease: 
Release: otherReproducibility: Every Time
Planned Release: None

Fri Jul 31 07:13:03 2015, comment #3:


For some reason I preferred not using UUIDs when setting it up, can't remember why exactly..

Konstantin Svist <fry_kun>
Fri Jul 31 04:00:52 2015, comment #2:

@Konstantin: Why it tries to use devices in your case? It should be using UUID.

Andrei Borzenkov <arvidjaar>
Project Member
Fri Jul 31 00:01:32 2015, comment #1:

I'm hitting this problem in Fedora 22 with RAID1 Btrfs

As described by Florian, grub2-mkconfig gets a list of devices in GRUB_DEVICE -- which is subsequently written into generated grub.cfg like so:

linux16 /subvol_root/boot/vmlinuz-4.1.2-200.fc22.x86_64 root=/dev/sda3
/dev/sdb3 ro rootflags=subvol=subvol_root rd.md=0 rd.lvm=0 rd.dm=0 rd.luks=0 quiet rhgb raid=noautodetect
initrd16 /subvol_root/boot/initramfs-4.1.2-200.fc22.x86_64.img

# grub2-mkconfig -v
grub2-mkconfig (GRUB) 2.02~beta2
rpm -q grub2

Konstantin Svist <fry_kun>
Sun Jul 28 15:29:53 2013, original submission:

using grub-2.00.5043-3 from arch linux testing.

grub-mkconfig line 131:
GRUB_DEVICE="`${grub_probe} --target=device /`"

on a btrfs raid GRUB_DEVICE now holds a list of devices. this fails in several places when generating the grub.cfg.
for example the next line will fail:

GRUB_DEVICE_UUID="`${grub_probe} --device ${GRUB_DEVICE} --target=fs_uuid 2> /dev/null`" || true

a solution would be to change this to:

GRUB_DEVICE_UUID="`${grub_probe} --target=fs_uuid / 2> /dev/null`" || true

and use GRUB_DEVICE_UUID instead of GRUB_DEVICE everywhere if set.

another quick fix would be:

GRUB_DEVICE="`${grub_probe} --target=device / | head -n 1`"

to only look at the first returned device.

Florian Scandella <fscan>


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Carbon-Copy List
  • -unavailable- added by arvidjaar (Posted a comment)
  • -unavailable- added by fry_kun (Posted a comment)
  • -unavailable- added by fry_kun (Voted in favor of this item)
  • -unavailable- added by phcoder (Updated the item)
  • -unavailable- added by fscan (Submitted the item)

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    Follow 3 latest changes.

    Date Changed By Updated Field Previous Value => Replaced By
    Fri Jul 31 00:01:32 2015fry_kunCarbon-Copy-=>Added fry_kun
    Mon Oct 14 16:30:59 2013phcoderStatusNone=>Fixed

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