[Bug 1876974] Re: Support multiple ESPs

[Julian Andres Klode]

It needs to be a valid ESP. probably it's just a fat32 partition, but
not a valid ESP - wrong partition type set in got/mbr if it's not shown.

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https://bugs.launchpad.net/bugs/1876974

Title:
  Support multiple ESPs

Status in grub2 package in Ubuntu:
  Confirmed

Bug description:
  Subiquity has the brilliant feature of supporting installing to
  multiple ESP's. See https://bugs.launchpad.net/subiquity/+bug/1817066
  for details.

  grub-install does not mirror this feature this out of the box, but
  updates the ESP on /boot/efi only by default on such an installation.
  Whenever efi potentially changes, this leaves the backup ESP without
  the update.

  Adding this support would be coherent, since an admin may logically
  assume the install mode is supported beyond the installation phase.

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