Bug 723626 - grub-installl fails (new-kernel-pkg also fails too) on nodev filesystems
Summary: grub-installl fails (new-kernel-pkg also fails too) on nodev filesystems
Alias: None
Product: Fedora
Classification: Fedora
Component: grub
Version: 15
Hardware: x86_64
OS: Linux
Target Milestone: ---
Assignee: Peter Jones
QA Contact: Fedora Extras Quality Assurance
Depends On:
TreeView+ depends on / blocked
Reported: 2011-07-20 17:51 UTC by Rudd-O DragonFear
Modified: 2017-10-02 23:06 UTC (History)
6 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2012-08-07 18:04:05 UTC
Type: ---

Attachments (Terms of Use)

Description Rudd-O DragonFear 2011-07-20 17:51:10 UTC
n my zfs on linux zfs root system, where /boot is on ext4 and / is on zfs (dracut, etcetera), grub/install /dev/sda fails with an error message "Could not find device for ", which then makes new-kernel-pkg (and therefore kernel installations) fail.

Has anyone encountered this?  Any solutions?


ssd                                                /                                  zfs      noatime,xattr                               0 0
/dev/sda1                                          /boot                              ext4     noatime                                     0 1
/dev/sda2                                          swap                               swap     defaults                                    0 0

I have tracked the problem to this line in grub-install:

df $1/ | sed -n 's%.*\(/dev/[^   ]*\).*%\1%p'

this of course returns something empty, therefore no root device is found even if specified with --root-directory=/

The bug for kernel installations in new-kernel-pkg / grubby is different, they cannot find the root device too, but it's not because of grub-install.

Of course, there is no root device proper in ZFS (or btrfs for that matter) so of course it does not work.  The script ought to be modified to ignore the absence of a root file system device IF the physical boot device can be found.


Comment 1 Rudd-O DragonFear 2012-02-01 01:31:42 UTC
The bug persists.  The line in grub2-mkconfig where it dies is this:

# Device containing our userland.  Typically used for root= parameter.
GRUB_DEVICE="`${grub_probe} --target=device /`"
GRUB_DEVICE_UUID="`${grub_probe} --device ${GRUB_DEVICE} --target=fs_uuid 2> /dev/null`" || true

# Device containing our /boot partition.  Usually the same as GRUB_DEVICE.
GRUB_DEVICE_BOOT="`${grub_probe} --target=device /boot`"
GRUB_DEVICE_BOOT_UUID="`${grub_probe} --device ${GRUB_DEVICE_BOOT} --target=fs_uuid 2> /dev/null`" || true

grub-probe should return something like "ZFS=path/to/ZFS/filesystem/containing/root" when the root file system is hosted on a ZFS file system.  This will solve the bug.

Comment 2 Rudd-O DragonFear 2012-02-01 22:27:13 UTC
Persists in F16.

Comment 3 Fedora End Of Life 2012-08-07 18:04:07 UTC
This message is a notice that Fedora 15 is now at end of life. Fedora
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