[Bug 1077650] Re: booting from raid in degraded mode ends in endless loop

[Thiago Martins]

So, brand new Ubuntu 14.04 and, impossible to boot it in degraded
mode...

---
I just install a server with:

/dev/sda1 = /dev/md0 = /boot
/dev/sda2 = /dev/md1 = LVM VG: vg01 = LVM LV: swap / LVM LV: root (ext4)

/dev/sdb not present.

Installation finishes without any problem, system doesn't boot.

--

If I do not use LVM, like this:

/dev/sda1 = /dev/md0 = /
/dev/sda2 = SWAP

/dev/sdb not present.

Ubuntu also doesn't boot (in degraded)...

I also tried this:

/dev/sda1 = /dev/md0 = /boot
/dev/sda2 = /dev/md1 = /
/dev/sda3 = SWAP

/dev/sdb not present.

Doesn't boot either.

---

This problem have nothing to do with LVM on top of raid1...

After adding /dev/sdb, sync raid1, system boots okay.

Come on guys, I'm a "Ubuntu Evangelist" but, problems like this are a
shame. Sorry, I don't want to be rude... Sad, but true.

Regards,
Thiago

-- 
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https://bugs.launchpad.net/bugs/1077650

Title:
  booting from raid in degraded mode ends in endless loop

Status in “mdadm” package in Ubuntu:
  Confirmed

Bug description:
  Its basically the same as reported here:

  http://efreedom.com/Question/6-103895/Can-Boot-Degraded-Mdadm-Array

  So I just installed a new system, which is supposed to get later on an
  additional disk. For now I created md raid1 devices with one disk
  missing. To get ubuntu booting at all without complaining about a
  missing disk I already added "bootdegraded=yes" to the kernel command
  line. And now it ends in an endless loop of

  unused devices: <none>
  Attempting to start the RAID in degraded mode...
  mdadm: CREATE group disk not found
  Started the RAID in degraded mode.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.10
  Package: initramfs-tools 0.103ubuntu0.2
  ProcVersionSignature: Ubuntu 3.5.0-17.28-generic 3.5.5
  Uname: Linux 3.5.0-17-generic x86_64
  ApportVersion: 2.6.1-0ubuntu3
  Architecture: amd64
  Date: Sun Nov 11 16:26:55 2012
  PackageArchitecture: all
  ProcEnviron:
   LANGUAGE=en
   TERM=xterm
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: initramfs-tools
  UpgradeStatus: Upgraded to quantal on 2012-01-08 (308 days ago)

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