[Bug 1190295] Re: latest 10.04 kernel update breaks software RAID + LVM

[bl8n8r]

Prior to rebooting the system, these were the contents of
/var/cache/apt/archives showing which patches had just been applied.
This system had been running and rebooting for months prior to applying
these patches.


[11:42 06/12/13]
[root at usb-live /mnt/slash]
#  dir var/cache/apt/archives/
total 46260
-rw-r--r-- 1 root root    51876 Dec  4  2007 libdbi0_0.8.2-3_amd64.deb
-rw-r--r-- 1 root root    60626 Nov  6  2009 libnet1_1.1.4-2_amd64.deb
-rw-r--r-- 1 root root   342662 Sep  6  2010 syslog-ng_3.1.2-1~lucid1_amd64.deb
-rw-r--r-- 1 root root   276106 May 25  2011 language-selector-common_0.5.8+langfixes~lucid2_all.deb
-rw-r--r-- 1 root root  1501242 Oct  7  2011 postfix_2.8.5-2~build0.10.04_amd64.deb
-rw-r--r-- 1 root root     5138 May  7 04:33 linux-headers-server_2.6.32.47.54_amd64.deb
-rw-r--r-- 1 root root     5140 May  7 04:33 linux-server_2.6.32.47.54_amd64.deb
-rw-r--r-- 1 root root     5144 May  7 04:33 linux-image-server_2.6.32.47.54_amd64.deb
-rw-r--r-- 1 root root 10175388 May  7 04:34 linux-headers-2.6.32-47_2.6.32-47.109_all.deb
-rw-r--r-- 1 root root 31861814 May  7 04:34 linux-image-2.6.32-47-server_2.6.32-47.109_amd64.deb
-rw-r--r-- 1 root root   837616 May  7 04:34 linux-headers-2.6.32-47-server_2.6.32-47.109_amd64.deb
-rw-r--r-- 1 root root   335916 May 23 21:04 dhcp3-common_3.1.3-2ubuntu3.5_amd64.deb
-rw-r--r-- 1 root root   275594 May 23 21:04 dhcp3-client_3.1.3-2ubuntu3.5_amd64.deb
-rw-r--r-- 1 root root   417662 May 29 13:03 libgnutls26_2.8.5-2ubuntu0.4_amd64.deb
-rw-r--r-- 1 root root    43626 Jun  5 12:08 libxext6_2%3a1.1.1-2ubuntu0.1_amd64.deb
-rw-r--r-- 1 root root    43186 Jun  5 12:08 libxcb1_1.5-2ubuntu0.1_amd64.deb
-rw-r--r-- 1 root root   233946 Jun  5 12:08 libx11-data_2%3a1.3.2-1ubuntu3.1_all.deb
-rw-r--r-- 1 root root   844966 Jun  5 12:08 libx11-6_2%3a1.3.2-1ubuntu3.1_amd64.deb
drwxr-xr-x 2 root root     4096 Jun 12 10:08 partial
drwxr-xr-x 3 root root     4096 Jun 12 10:08 .
drwxr-xr-x 3 root root     4096 Jun 12 10:11 ..

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https://bugs.launchpad.net/bugs/1190295

Title:
  latest 10.04 kernel update breaks software RAID + LVM

Status in “partman-base” package in Ubuntu:
  New

Bug description:
  Been running 10.04 LTS on 8 similar AMD Opteron x86_64 servers for
  several years.  The servers have been kept up-to-date with patches as
  they come out.  These servers have been running 2.6.x kernels. Each
  server has some form of Linux software RAID running on it as well as
  3Ware hardware RAID card using SATA disks.  Software RAID is
  configured as RAID1 for all but one server running software RAID10.
  All servers had software raid configured to use single partitions on
  each disk of types of 0xFD (Linux Software Raid Autodetect).  All
  servers were configured with LVM over the top of /dev/md0.

  In past year, mysterious problems have been happening with software
  RAID after applying system patches.  Upon reboot, server is unable to
  mount LVM partitions on Linux software RAID and boot is interrupted
  with "Continue to wait; or Press S to skip mounting or M for manual
  recovery" requiring intervention from an operator.

  Upon pressing 'M' and logging in as root, the LVM slices on the
  software RAID partition are not mounted and sometimes appear to be
  missing from LVM.  Oftentimes pvs, vgs and lvs will complain about
  "leaking memory". Germane to the issue, LVM will sometimes show the
  problem partitions as "Active" while other times during the login,
  they will simply be gone.  With LVM  and /dev/md0 unstable, there is
  no way to discern the true state of the partitons in question.
  Starting the system from alternate boot media such as CDROM or USB
  drive, sometimes shows the software RAID and LVM in proper state which
  leads to suspicion of a kernel update on the afflicted system.
  Historically and subjectively, best practice in this instance seems to
  be booting from live media and starting the array degraded mode, and
  backing up the array.

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