[Bug 1979852] Re: live-cd install to flash drive renders NVME Ubuntu install unbootable

[Brian Murray]

** Package changed: ubuntu => ubiquity (Ubuntu)

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Title:
  live-cd install to flash drive renders NVME Ubuntu install unbootable

Status in ubiquity package in Ubuntu:
  New

Bug description:
  I have Ubuntu 20.4.4 zfs installed on a NVME drive.  I was trying to
  use the live-cd to install another copy of Ubuntu (full install) onto
  a flash drive.  The installation went ahead successfully but when
  trying to reboot it hung and I had to restart the computer after 30
  minutes.  However, when I restarted the computer the installation on
  the NVME drive was unbootable.

  Apparently, the live-cd overwrote the grub configuration on the NVME drive. The only way to recover from this is to drop to the command line in grub and issue the the commands described on this web page:
  https://askubuntu.com/questions/1225751/recovering-a-borked-grub-with-a-ubuntu-19-10-zfs-root-filesystem

  Then run update-grub.

  The evidence for this is the following two lines in the fstab on the flash drive.
  /boot/efi was on /dev/nvme0n1p1 during installation
  UUID=1887-580A  /boot/efi       vfat    umask=0022,fmask=0022,dmask=0022      0       1

  The correction to fstab on the flash drive was the following:
  # update to point to flash drive
  UUID=91EF-3687  /boot/efi       vfat    umask=0022,fmask=0022,dmask=0022      0       1

  Also this recovery procedure from the Grub command line would be
  easier of grub could read zfs partition instead of saying it is a
  unknown file system

  Also,  there is no reason for the live-cd to access any other drive
  than the one that it is installing on -- this is required for a safe
  installation procedure.

  Note: attached file contains configuration of my system after fstab on
  the flash drive was fixed to point to correct drive.

  Regards,
  Bob Wheater

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