[Bug 1975860] Re: RAID/LVM configuration doesn't display drives in selection menu - expected MD_LEVEL

[nikhil kshirsagar]

It's expected behavior for MD_LEVEL not to be set for inactive raid
devices. Looking at 64-md-raid.rules,

# do not edit this file, it will be overwritten on update

SUBSYSTEM!="block", GOTO="md_end"

# handle md arrays
ACTION!="add|change", GOTO="md_end"
KERNEL!="md*", GOTO="md_end"

# partitions have no md/{array_state,metadata_version}, but should not
# for that reason be ignored.
ENV{DEVTYPE}=="partition", GOTO="md_ignore_state"

# container devices have a metadata version of e.g. 'external:ddf' and
# never leave state 'inactive'
ATTR{md/metadata_version}=="external:[A-Za-z]*", ATTR{md/array_state}=="inactive", GOTO="md_ignore_state" <==
TEST!="md/array_state", ENV{SYSTEMD_READY}="0", GOTO="md_end"
ATTR{md/array_state}=="|clear|inactive", ENV{SYSTEMD_READY}="0", GOTO="md_end"
LABEL="md_ignore_state"

IMPORT{program}="/sbin/mdadm --detail --export $devnode"
ENV{DEVTYPE}=="disk", ENV{MD_NAME}=="?*", SYMLINK+="disk/by-id/md-name-$env{MD_NAME}", OPTIONS+="string_escape=replace"
<SNIP>

LABEL="md_end"

So IMPORT{program}="/sbin/mdadm --detail --export $devnode" is skipped
if the array is inactive.

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https://bugs.launchpad.net/bugs/1975860

Title:
  RAID/LVM configuration doesn't display drives in selection menu -
  expected MD_LEVEL

Status in subiquity package in Ubuntu:
  Confirmed

Bug description:
  Trying to install 22.04 LTS Server from Live image. Both the subiquity
  version provided with the ISO and the "new" version it prompts to load
  from internet, appear to have this issue.

  I can select items for a RAID/LVM volume, but they are not displayed;
  they show up as blank lines but the total size at the bottom changes
  as semi-blindly select/deselect them.

  I'm not sure how to grab versions as specified since this is prior to
  having a working system.

  Image of problem attached.

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