** Summary changed:

- ppc64 cloud images boot only once
+ growpart breaks ppc64 images / sfdisk changes partition type

** Description changed:

  rebooting a wily cloud image under ppc64 qemu fails to come back up.
  also power off then start causes this issue.
  
  It ends in a SLOF prompt after showing:
  
  Trying to load:  from: disk ...
  No DOS disk-label found.
  
  E3404: Not a bootable device!
  Trying to load:  from: disk1 ...
  No DOS disk-label found.
  
  E3404: Not a bootable device!
  Trying to load:  from: cdrom ... No medium !
  
  E3405: No such device
  Trying to load:  from: net ...
   Bootloader 1.6
    Reading MAC address from device: 52:54:00:12:34:56
    Requesting IP address via DHCP: 10.0.2.15
    Requesting file "" via TFTP from 10.0.2.2
    Receiving data:  0 KBytes
  E3010 (net) TFTP access violation
+ 
+ 
+ the reason for this is that growpart used sfdisk to resize the disk, and
+ sfdisk changed the partition type of the PReP partition to the default
+ Linux partition type.  The bootloader then did not consider this a
+ partition.

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https://bugs.launchpad.net/bugs/1474090

Title:
  growpart breaks ppc64 images / sfdisk changes partition type

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