[Bug 2094979] Re: curtin misidentify /dev/md126p3 as a multipath device, generates unbootable grub config

[Yao Wei]

I can confirm the MP has been merged in current ubuntu-desktop-bootstrap
24.04/stable (rev 413), but not subiquity 24.04/stable (rev 6405)

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https://bugs.launchpad.net/bugs/2094979

Title:
  curtin misidentify /dev/md126p3 as a multipath device, generates
  unbootable grub config

Status in curtin:
  Fix Committed
Status in OEM Priority Project:
  New
Status in subiquity:
  Fix Released
Status in subiquity package in Ubuntu:
  Fix Released
Status in subiquity source package in Noble:
  Fix Committed
Status in subiquity source package in Plucky:
  Fix Released

Bug description:
  (Note that it shares the same log as LP: #2094966)

  We found that, on system with Intel firmware RAID (IMSM), when doing
  OEM factory reset and workaround the bug LP: #2094966 by forcing
  "layout.name: direct" installation to /dev/md126, subiquity can finish
  the installation, but curtin will install a GRUB config that forces
  device to boot into multipath device /dev/mapper/mpath0-part3

  Log suggests that it detects /dev/md126p3 as a multipath device, but
  it should not be.

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