[bug #63839] LVM partition not show if insmod mdraid1x before insmod lvm

[Guillermo Reisch]

URL:
  <https://savannah.gnu.org/bugs/?63839>

                 Summary: LVM partition not show if insmod mdraid1x before
insmod lvm
                   Group: GNU GRUB
               Submitter: guillere
               Submitted: Sun 26 Feb 2023 05:31:58 PM UTC
                Category: None
                Severity: Major
                Priority: 5 - Normal
              Item Group: None
                  Status: None
                 Privacy: Public
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
                 Release: other
                 Release: 
         Discussion Lock: Any
         Reproducibility: Every Time
         Planned Release: None


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Follow-up Comments:


-------------------------------------------------------
Date: Sun 26 Feb 2023 05:31:58 PM UTC By: Guillermo Reisch <guillere>
this problem is in grub 2.06 (debian 2.06-8)
I have a LVM partition inside a RAID (mdadm raid)
Disk: (whole disk) => RAID => PV => LVM

Creation of disk (/dev/diskA)
 mdadm --create /dev/md/raid --level=1 --raid-devices=2 /dev/diskA missing
 pvcreate /dev/md/raid
 vgcreate vgr /dev/md/raid
 lvcreate --name A --size 12M gvr

bug:
booting grub2
insmod mdraid1x
insmod lvm
ls
 (hd0) (md/raid)
... lvm partition is not show ...

work around:
booting grub2
insmod lvm
insmod mdraid1x
ls
 (hd0) (md/raid) (lvm/vgr-A)

-----
This problem was firts find in my machine that have 5 disk each partitioned in
raid1 and raid5 ; the boot partition is in the raid1 (that is formated in
ext4) so grub2 preload "mdraid1x" and "ext2" and boot perfeclty! The problem:
I want to migrate the boot partition inside a LVM partiton (that is inside the
raid5 that is the PV of this LVM), i do update-grub (that create a correct
menu entry and include "insmod lvm") but "insmod lvm" is loaded after "insmod
mdraid1x" so the boot partion is not show and cannot boot.
I reproduce this problem in a virtualbox so enconter that "insmod lvm" need to
be loaded before "insmod mdraid1x" to grub discover the partition correctly







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