The reason for this failure is that the BLKZNAME ioctl is different, zfs 0.6.x has a 255 char name where as 0.7.0 has a 256 char name.
There are test packages ready for testing in a PPA, do you mind trying these out using: sudo add-apt-repository ppa:colin-king/zfs-lp1763067 sudo apt-get update sudo apt-get dist-upgrade And let me know if this fixes the issue. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to zfs-linux in Ubuntu. https://bugs.launchpad.net/bugs/1763067 Title: zvol_id throws ioctl_get_msg failed:Inappropriate ioctl for device Status in zfs-linux package in Ubuntu: In Progress Bug description: Symlinks in /dev/zvol are not created because /lib/udev/zvol_id crashes with ioctl_get_msg failed:Inappropriate ioctl for device. Description: Ubuntu 16.04.4 LTS Release: 16.04 Running linux-generic-hwe-16.04-edge 4.15.0-13-generic zfsutils-linux 0.6.5.6-0ubuntu19 The version of zvol_id in zfsutils-linux_0.7.5-1ubuntu14_amd64 works without error. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/zfs-linux/+bug/1763067/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp