[Bug 1293811] Re: casper no longer wants to boot off HDD devices

[Dinesh]

I have Dell Latitude e6500 Laptop, Core 2 Duo Processor. Fresh
installation in a external HDD.

Ubuntu version 14.04 LTS ; Casper version is 1.340.2.

Unable to expand the persistent partition and struck in

dmar: IOMMU: failed to map dmar0
ACPI PCC probe failed.

BusyBox v1.12.1 (Ubuntu 1:21.0-1ubuntu1) built-in shell (ash)
Enter 'help' for a list of built-in commands.

(initramfs) _

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https://bugs.launchpad.net/bugs/1293811

Title:
  casper no longer wants to boot off HDD devices

Status in casper package in Ubuntu:
  Fix Released

Bug description:
  Some time in the last year or so casper appears to have stopped
  wanting to boot off HDD devices.  It previously was able to by setting
  UUID= on the command line or by having a common casper-uuid-
  generic.conf to the initrd that was booted.

  I've tried to narrow this down a little bit, and I believe the problem
  is in:

  is_nice_device

  Previously, udev would be queried to determine if the given device
  matched this path:

  usb|pci-[^-]*-(ide|sas|scsi|usb|virtio)|platform-sata_mv|platform-
  orion-ehci|platform-mmc|platform-mxsdhci|platform-omap_hsmmc|platform-
  sdhci-tegra|platform-tegra-ehci

  Unfortunately according to bug
  https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1193705 the by-
  path mechanism used by udev no longer works.

  This does match the behavior I see that the command in question in the
  busted initrd prompt doesn't output anything useful like it used to.

  I've reproduced this using the 14.04 daily image from March 17th.

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