Public bug reported:

I was using 10.04 Server LTS when I decided to do an upgrade.
I'm using fakeraid and my boot path is /dev/mapper/isw_ecdhgaacgh_Volume01
After running the "do-release-upgrade" and rebooting, the boot failed with an 
error and a busybox with "ALERT! /dev/mapper/isw_ecdhgaacgh_Volume01 does not 
exist".

Somewhere along the upgrade process from 10.04 to 11 the actual root
switched names from /dev/mapper/isw_ecdhgaacgh_Volume01 to
/dev/mapper/isw_ecdhgaacgh_Volume0p1. I figured that out, when I did "ls
/dev/mapper" in the busybox. So basically, my menu.lst still had the
"01", but the new kernel was now attaching volumes to "0p1".

Well, it wasn't that hard to fix. I rebooted the system with the old
kernel (which was luckily still available in menu.lst), then changed the
paths in /boot/grub/menu.lst and /etc/fstab from
/dev/mapper/isw_ecdhgaacgh_Volume01 to
/dev/mapper/isw_ecdhgaacgh_Volume0p1 and rebooted again.

Got it fixed by hand, but still - this bug shouldn't be in the upgrade
stream.

** Affects: dmraid (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: boot dmraid kernel mapper

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https://bugs.launchpad.net/bugs/820810

Title:
  After upgrading from 10.04 system would not boot

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