I have been having this same problem except on a separate partition ( not root). I was able to get past the "failed to mount" issue by running modprobe but then I get
● zfs-share.service - ZFS file system shares Loaded: loaded (/lib/systemd/system/zfs-share.service; enabled; vendor preset: enabled) Active: failed (Result: exit-code) since Mon 2019-08-05 18:43:16 EDT; 9ms ago Docs: man:zfs(8) Process: 27806 ExecStartPre=/bin/rm -f /etc/dfs/sharetab (code=exited, status=0/SUCCESS) Process: 27807 ExecStart=/sbin/zfs share -a (code=exited, status=1/FAILURE) Main PID: 27807 (code=exited, status=1/FAILURE) Aug 05 18:43:16 X470-AORUS-ULTRA systemd[1]: Starting ZFS file system shares... Aug 05 18:43:16 X470-AORUS-ULTRA zfs[27807]: cannot share 'Media': share(1M) failed Aug 05 18:43:16 X470-AORUS-ULTRA systemd[1]: zfs-share.service: Main process exited, code=exited, status=1/FAILURE Aug 05 18:43:16 X470-AORUS-ULTRA systemd[1]: zfs-share.service: Failed with result 'exit-code'. Aug 05 18:43:16 X470-AORUS-ULTRA systemd[1]: Failed to start ZFS file system shares. dpkg: error processing package zfsutils-linux (--configure): installed zfsutils-linux package post-installation script subprocess returned error exit status 1 Setting up gcc-8-base:i386 (8.3.0-6) ... Setting up libgpg-error-l10n (1.35-1) ... dpkg: dependency problems prevent configuration of zfs-zed: zfs-zed depends on zfsutils-linux (>= 0.7.12-2+deb10u1); however: Package zfsutils-linux is not configured yet. dpkg: error processing package zfs-zed (--configure): dependency problems - leaving unconfigured I assumed it was my fault, something stupid I did, untill yesterday after a fresh install of buster, using ext4 for my root partition. Sent with [ProtonMail](https://protonmail.com) Secure Email.