[Bug 1847944] Re: partman-auto 134ubuntu11 prevents installation from recovery partition

[Dimitri John Ledkov]

In Disco:
- .iso from a CD-ROM or USB stick is mounted as whole block device, i.e. /dev/sr0 /dev/sda
- .iso from a partition on disk (i.e. recovery partition) is mounted as a partition, i.e. /dev/sda1
- in partman-auto black-list is set on whole block device mounts, i.e. /dev/sr0 /dev/sda

In Eoan:
- .iso from a CD-ROM or USB stick is mounted as a partition, i.e. /dev/sr01 (?!) /dev/sda1
- .iso from a partition on disk (i.e. recovery partition) is mounted as a partition, i.e. /dev/sda1
- in partman-auto blacklist is set on either whole block device or partition mounts, i.e. /dev/sda /dev/sda1 etc.

So, that's where we are at.

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https://bugs.launchpad.net/bugs/1847944

Title:
  partman-auto 134ubuntu11 prevents installation from recovery partition

Status in partman-auto package in Ubuntu:
  Triaged
Status in partman-auto source package in Eoan:
  Triaged

Bug description:
  Partman-auto 134ubuntu11 added a new check to try to resolve bug
  1845571 but in doing so, broke OEM installation from hard disk.

  OEM installation from hard disk will place the ubuntu ISO image into a
  recovery partition and boot from that to install.  It is preseeded
  such that the free space will use an expert recipe to install into.

  Reverting changes from 134ubuntu11 back to 134ubuntu10 fixes OEM
  installation again.

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