Ubuntu
mdadm package

  1. Bug #462258
  2. Comment #0

Comment 0 for bug 462258

Revision history for this message
Jamie Strandboge (jdstrand) wrote : raid1 won't boot in degraded mode

Binary package hint: mdadm

In testing raid1 according to http://testcases.qa.ubuntu.com/Install/ServerRAID1, the system installed fine and both disks show up in /proc/mdstat. I installed using my procedure found in https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/457687/comments/6. I anwered 'yes' to booting in degraded mode. I noticed during install the grub-install did reference both /dev/vda and /dev/vdb

However, if I remove the first disk (vda), the system drops to the initramfs telling me the disk could not be found. If I remove the second disk (after adding the first disk back), I'm told about the 'bootdegraded=true' option.

This ends up being a major usability issue as well, because there is no grub boot menu since this was the only operating system installed. I looked in /etc/default/grub and only saw:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"

I believe this needs bootdegraded=true to work. I'll try to debug later, but it clearly doesn't work.