[Bug 2045006] Re: Fail to create GPT backup header when rootfs structure size smaller than actual rootfs contents

[Emilio Lopez]

Hi Paul,

This was found in the snap version of ubuntu-image v3.2.

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Title:
  Fail to create GPT backup header when rootfs structure size smaller
  than actual rootfs contents

Status in Ubuntu Image:
  New

Bug description:
  Fail to create GPT backup header when rootfs structure size smaller
  than actual rootfs contents

  Error message:
  [8] populate_prepare_partitions
  WARNING: rootfs structure size 750 MiB smaller than actual rootfs contents 1.63 GiB

  Image built by ubuntu-image 2.x:
  004: 000 0000002048 0002459647 0002457600 EFI System
  005: 001 0002459648 0005874131 0003414484 writable

  Image built by ubuntu-image 1.x:
  004: 000 0000002048 0002459647 0002457600 EFI System
  005: 001 0002459648 0005874131 0003414484 writable
  006: ------- 0005874132 0005874165 0000000034 Unallocated

  ubuntu-image 1.x can create GPT backup header even though rootfs
  structure size smaller than actual rootfs contents. But, the GPT
  backup header isn't generated when using ubuntu-image 2.x.

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