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

[Thomas Maerz]

Tom Mercelis,

I have wiped the array all the way down to the individual disk partition
tables multiple times and the issue still persisted for me. I have
finally solved this problem by switching to CentOS last night. Looks
like that's going to be the only solution to this for a while, since
this issue has been open for a year and a half and they haven't done
much to solve it.

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https://bugs.launchpad.net/bugs/990913

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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