initramfs is missing dm_raid dm target (lvm2 does a full resync on every MD raid1 mirror volume on boot)

[Andy Whitcroft]

When booting a system which has LVM volumes which are MD raid1 targets they will be resync'd in full in the initrd every time you boot. This leads to boot timeouts and enormous boot delays.

[Andy Whitcroft (apw)]

If you boot break=bottom you find that LVM is unable to start those volumes, and it is unable to determine their current sync state. This seems to trigger some sort of manual initialisation of the volumes.

Confirmed that this affects both saucy and raring.

[Andy Whitcroft (apw)]

Further targetting this to precise as that also will support these via the backports kernels.

[Andy Whitcroft (apw)]

Ok this seems to be triggered by the lack of the dm_raid dm target in the initramfs which prevents us from converting the configuration we have for these LVS into device mapper targets, and leads to this suboptimal copying.

[Launchpad Janitor (janitor)]

This bug was fixed in the package lvm2 - 2.02.98-1ubuntu4

---------------
lvm2 (2.02.98-1ubuntu4) saucy; urgency=low

  * hooks/lvm2: add dm_raid to the dm personality modules to be included in
    the initramfs as this is a valid personality for the root filesystem
    and such volumes lead to extended boot times and boot failures.
    (LP: #1206235)
 -- Andy Whitcroft <email address hidden> Mon, 29 Jul 2013 20:37:28 +0100

[Rolf Leggewie (r0lf)]

raring has seen the end of its life and is no longer receiving any updates. Marking the raring task for this ticket as "Won't Fix".