[Bug 1548411] updated patch with better error checking

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** Attachment added: "updated patch with better error checking"
   https://bugs.launchpad.net/bugs/1548411/+attachment/4584510/+files/0001-parted_devices-Add-disk-label-type-to-device-directo.patch

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https://bugs.launchpad.net/bugs/1548411

Title:
  Installing Ubuntu as KVM guest is not possible because the installer
  fails to detect Virtual Disk correctly

Status in debian-installer package in Ubuntu:
  Invalid
Status in parted package in Ubuntu:
  Invalid
Status in partman-base package in Ubuntu:
  Fix Released
Status in partman-partitioning package in Ubuntu:
  Fix Released
Status in debian-installer package in Debian:
  New

Bug description:
  Parted package:
  - fails to create dasd partitioning table, on qcow2 backed virtio ccw drives.
  - it can create dasd partitioning table, if said virtio ccw drive is backed by a real DASD drive.

  
  == Comment: #0 - Michael Roesch - 2016-02-18 11:09:27 ==
  Installer version: 421
  Kernel: 4.4.0.4

  When trying to partition a KVM Virtual Disk, in my case based on a
  qcow2 image file, the partitioner is detecting the disk to be a DASD

  Virtual disk 1 (vda) - 10.7 GB Virtio Block Device
  >     #1    10.7 GB    f  ext4          /
  >            8.7 kB       FREE SPACE

  It then uses fdasd to partition it. This fails with the error:

  "fdasd: Unsupported disk type -- Disk geometry does not match a DASD
  device of type 3390."

  I have attached the syslog and partman log files, as well as my guest
  definition file.

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