[Bug 818177] Re: HP DL380G5 root disk mounted read-only on boot and boot fails

[Stefan Bader]

This looks quite like it is likely related to /usr/share/initramfs-
tools/scripts/init-bottom/udev. How things should work is:

- we got the initramfs mounted as initial /
- udev gets started and left running until the real root device node becomes available
- now udev gets stopped (used to be clubbed to death which caused even more problems) and /dev is tried to be
  moved to <realroot>/dev.
- <newroot> bcomes /,  restart udev, and things should proceed from there

>From the serial console log of comment #18 it looks like things went ok
until the time udev should stop. There is no error message there but
somehow it looks like fsck in the new / does not find the uuid link for
it. Unclear whether maybe the move of /dev did not work, or did the
previous step resolve the uuid to dev without the symlink? As Adam
mentioned before, allowing udev to settle helps. So the race is
somewhere there. Whoever can reproduce this may want to add additional
echo's to the init-bottom script.

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https://bugs.launchpad.net/bugs/818177

Title:
  HP DL380G5 root disk mounted read-only on boot and boot fails

Status in “linux” package in Ubuntu:
  Incomplete
Status in “udev” package in Ubuntu:
  Confirmed

Bug description:
  After running a do-release-upgrade -d on a natty server, I'm unable to
  boot the machine properly.

  It looks like it doesn't see the local disks anymore.

  I think this looks quite a lot like the debbug linked from here:
  https://bugs.launchpad.net/ubuntu/oneiric/+source/linux/+bug/746751

  ProblemType: Bug
  DistroRelease: Ubuntu 11.10
  Package: linux-image-3.0.0-7-server 3.0.0-7.8
  ProcVersionSignature: Ubuntu 3.0.0-7.8-server 3.0.0
  Uname: Linux 3.0.0-7-server x86_64
  AlsaDevices:
   total 0
   crw-rw---- 1 root audio 116,  1 2011-07-29 13:34 seq
   crw-rw---- 1 root audio 116, 33 2011-07-29 13:34 timer
  AplayDevices: Error: [Errno 2] No such file or directory
  Architecture: amd64
  ArecordDevices: Error: [Errno 2] No such file or directory
  AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
  CRDA: Error: [Errno 2] No such file or directory
  Date: Fri Jul 29 13:40:10 2011
  HibernationDevice: RESUME=UUID=844d17fa-ff69-4250-844b-33b930236c56
  IwConfig:
   lo        no wireless extensions.
   
   eth0      no wireless extensions.
   
   eth1      no wireless extensions.
  MachineType: HP ProLiant DL380 G5
  PciMultimedia:
   
  ProcEnviron:
   LANGUAGE=en_US:
   PATH=(custom, user)
   LANG=en_US
   SHELL=/bin/bash
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.0.0-7-server root=/dev/mapper/User Name-root ro INIT_VERBOSE=yes
  RelatedPackageVersions:
   linux-restricted-modules-3.0.0-7-server N/A
   linux-backports-modules-3.0.0-7-server  N/A
   linux-firmware                          1.56
  RfKill: Error: [Errno 2] No such file or directory
  SourcePackage: linux
  UpgradeStatus: Upgraded to oneiric on 2011-07-29 (0 days ago)
  dmi.bios.date: 06/28/2007
  dmi.bios.vendor: HP
  dmi.bios.version: P56
  dmi.chassis.type: 23
  dmi.chassis.vendor: HP
  dmi.modalias: dmi:bvnHP:bvrP56:bd06/28/2007:svnHP:pnProLiantDL380G5:pvr:cvnHP:ct23:cvr:
  dmi.product.name: ProLiant DL380 G5
  dmi.sys.vendor: HP

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