[Bug 1811795] [NEW] Mdadm: external metadata arrays and containers are removed incorrectly

[Mariusz Tkaczyk]

Private bug reported:

Steps to reproduce:

1. Create IMSM container on 2 SATA disks.

2. Create R0 IMSM volume

3. Wait for resync to complete.

4. Fail one of disks

Expected result:
R0 Array should disappear form /proc/mdstat.

Actual result:
R0 array is visible in mdstat, link to container in /dev/md/ is removed.

** Affects: mdadm (Ubuntu)
     Importance: Undecided
         Status: New

** Information type changed from Public to Private

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https://bugs.launchpad.net/bugs/1811795

Title:
  Mdadm: external metadata arrays and containers are removed incorrectly

Status in mdadm package in Ubuntu:
  New

Bug description:
  Steps to reproduce:

  1. Create IMSM container on 2 SATA disks.

  2. Create R0 IMSM volume

  3. Wait for resync to complete.

  4. Fail one of disks

  Expected result:
  R0 Array should disappear form /proc/mdstat.

  Actual result:
  R0 array is visible in mdstat, link to container in /dev/md/ is removed.

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