[Bug 1770173] Re: 18.04 install stuck on grub install when a zfs disk is present

[J.T.]

I have just run into this same problem on both 18.04 Server and 19.04
Server Beta. After finding this bug report, I unplugged the drive array
full of ZFS disks and the local write cache disk only to still run into
the issue due to my nvme used for read cache.

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https://bugs.launchpad.net/bugs/1770173

Title:
  18.04 install stuck on grub install when a zfs disk is present

Status in os-prober package in Ubuntu:
  Triaged

Bug description:
  Installation freezes on grub install at 66%. syslog shows grub-install
  ran successfully, then seems to have actually gotten stuck in the next
  step (osprober). Photo attached, sorry for the terrible quality from
  HTC.

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