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

[Paul Mars]

Hey Emilio,

ubuntu-image is affected by several issues regarding partitions handling
and disk layout. We plan on investigate soon and we would like to
improve the code quality of this make it more reliable.

Just to make sure though: what version of ubuntu-image did you use?
Because since the initial issue was reported on discourse, ubuntu-image
was completely re-wrote.

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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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