[Bug 990913] Re: RAID goes into degrade mode on every boot 12.04 LTS server

[Alex Sorokine]

Looks like exactly the same issue affects 13.04 with 3.8 kernels.  I
have a system with OS installed on SSD and also it has a 2-disk 1TB
RAID1 with data.   After upgrading to 13.04 I've started to get a
message about failed RAID on every boot like described in this ticket.
The RAID in fact was not a failure.  As a workaround I am forcing grub
to boot into 3.5.0-34 kernel which does not have this problem.  I
noticed this problem with kernels  3.8.0-26 and 3.8.0-27.

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Title:
  RAID goes into degrade mode on every boot 12.04 LTS server

Status in “mdadm” package in Ubuntu:
  Confirmed

Bug description:
  I have 2 new Dell PowerEdge R515.
  Box have 2 internal SAS drives and 12 hot swap
  I create a 12 driver raid 6 array on the 12 hot swap drives
  without problem but on every reboot I get a message about 
  either degraded or not enough drives for the raid 6.

  If I shutdown and pull all 12 drives and let boot. Then plug them in.
  The array comes up fine most everytime.

  This happens on both of these new R512

  Also loaded 12.04 LTS server on a R710 and
  the mpt2sas load and times out. I had to
  add rootdelay=180 to boot parms.

  Description:    Ubuntu 12.04 LTS
  Release:        12.04

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