/dev/md0 fails to mount on boot

[Jeffrey Knockel]

Binary package hint: udev

Since upgrading from edgy to feisty beta1, my system gets thrown to busybox when booting. In busybox, /dev/md0 is missing, as well as the /dev/sd? drives that would normally constitute the array. This issue remains present with udev 108-0ubuntu2 and initramfs-tools 0.85eubuntu8. I do not use lvm.

Known workarounds:
(1) Boot with break=mount. Wait a couple of seconds, cd to /dev, and ensure that /dev/sd? and /dev/md0 are now there. Ctrl+d to continue booting normally.
Or (2) Install udev 0.105-4 from debian unstable. (This is undesirable for other reasons.)
Or (3) Apply the workaround mentioned here involving adding an attached udevSettle script to /usr/share/initramfs-tools/scripts/init-premount/:
https://launchpad.net/ubuntu/+source/initramfs-tools/+bug/83231/comments/19

[Scott James Remnant (Canonical) (canonical-scott)]

(1) doesn't make sense, since the system already loops for up to three minutes doing exactly this -- so breaking out of the initramfs shouldnt make a difference.

Anyway, please do that so your system boots, and then provide the output of:

  dpkg-query -W udev volumeid libvolume-id0 mdadm evms lvm2 lvm-common dmsetup libdevmapper1.02

Thanks

[Oliver Lemke (olemke)]

Scott, although it doesn't make sense, my Dell 390 Workstation shows exactly the same behaviour. / is on md0 (Two drive RAID1).

Here's the output from dpkg-query -W udev volumeid libvolume-id0 mdadm evms lvm2 lvm-common dmsetup libdevmapper1.02

udev 108-0ubuntu3
volumeid 108-0ubuntu3
libvolume-id0 108-0ubuntu3
mdadm 2.5.6-7ubuntu5
No packages found matching evms.
No packages found matching lvm2.
No packages found matching lvm-common.
dmsetup 2:1.02.08-1ubuntu10
libdevmapper1.02 2:1.02.08-1ubuntu10

[Jeffrey Knockel (jeff250)]

udev 108-0ubuntu3
volumeid 108-0ubuntu3
libvolume-id0 108-0ubuntu3
mdadm 2.5.6-7ubuntu5
No packages found matching evms.
No packages found matching lvm2.
No packages found matching lvm-common.
dmsetup 2:1.02.08-1ubuntu10
libdevmapper1.02 2:1.02.08-1ubuntu10

[Scott James Remnant (Canonical) (canonical-scott)]

This sounds like an exact duplicate of #103177, so I'm merging the two bugs ... the hack of adding a sleep between init-premount and local-top works for both, that implies that the mdadm/mdrun scripts are failing hard and not continuing.

Please follow the debugging questions there

[Launchpad Janitor (janitor)]

[Expired for mdadm (Ubuntu) because there has been no activity for 60 days.]