[Bug 1474090] Re: growpart breaks ppc64 images / sfdisk changes partition type

[Scott Moser]

** 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

Status in cloud-utils package in Ubuntu:
  Confirmed
Status in util-linux package in Ubuntu:
  Confirmed

Bug description:
  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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