On 32-bit sfdisk fails to parse the label-id if the MSB is set and thus
generates a new one. We happen to be unlucky with our (i386) cloud image
in that the original label-id has the MSB set. So when growpart run
(which calls sfdisk), the disk ID is regenerated and subsequent boots
fail because the kernel can't find the root device.


** Also affects: util-linux (Ubuntu)
   Importance: Undecided
       Status: New

** No longer affects: cloud-utils (Ubuntu)

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https://bugs.launchpad.net/bugs/1817302

Title:
  growpart changes diskid of mbr disks

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