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[Scott Moser <ssmoser2+ubuntu@xxxxxxxxx>]

I've marked this 'Fix Released' in xenial as Ubuntu's package in xenial
at 0.6.5.6-0ubuntu3 which has the fix at [1] as mentioned in comment 29.
Further, my experience with our zfs work in curtin indicates that it is
fixed.

--
https://github.com/zfsonlinux/zfs/commit/d2f3e292dccab23e47ade3c67677a10f353b9e85

** Changed in: zfs-linux (Ubuntu Xenial)
       Status: Confirmed => Fix Released

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https://bugs.launchpad.net/bugs/1527727

Title:
  grub-probe for zfs assumes all devices prefix with /dev, ignoring
  /dev/disk/...

Status in grub:
  Unknown
Status in grub2 package in Ubuntu:
  Fix Released
Status in grub2-signed package in Ubuntu:
  Fix Released
Status in zfs-linux package in Ubuntu:
  Fix Released
Status in grub2 source package in Xenial:
  In Progress
Status in grub2-signed source package in Xenial:
  In Progress
Status in zfs-linux source package in Xenial:
  Fix Released

Bug description:
  [Impact]
  Installs over ZFS where a ZFS disk is expected to be used as a root device.

  [Test case]
  - Run update-grub on a system with a ZFS root filesystem.

  [Regression Potential]
  Installs relying on the current broken behavior to avoid listing other operating systems in grub menu may find that new entries are added.

  ---

  update-grub runs /usr/sbin/grub-probe

  Without libzfslinux support compiled in, /usr/sbin/grub-probe runs
  ["zpool", "status", poolname] to find out ZFS info.

  zpool responds with device names as used at (I think!) pool creation
  time. Often, this is /dev/disk/by-id/... names, without the path.

  grub-probe then parses the output, and takes the names of devices, and
  if they do not start with a "/", it prepends "/dev/".

  It then tests the existence of the path name of the device. it fails.

  grub-probe then returns  something like

  /usr/sbin/grub-probe: error: failed to get canonical path of `/dev
  /ata-ST31000333AS_99999999-part1'.

  The actual path is of course /dev/disk/by-
  id/ST31000333AS_99999999-part1

  It can prepend smarter than "/dev" or it can understand ZFS natively,
  to fix the problem.

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