This has regressed in Zesty, because someone replaced the zfs-initramfs script.
** Changed in: zfs-linux (Ubuntu) Status: Fix Released => Confirmed -- 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/1550301 Title: ZFS: Set elevator=noop on disks in the root pool Status in zfs-linux package in Ubuntu: Confirmed Bug description: ZFS-on-Linux has its own I/O scheduler, so it sets the "noop" elevator on whole disks used in a pool. https://github.com/zfsonlinux/zfs/issues/90 It does not set the scheduler for a disk if a partition is used in a pool out of respect for the possibility that there are non-ZFS partitions on the same disk. https://github.com/zfsonlinux/zfs/issues/152 For regular pools, the recommendation is to use whole disks. For a root pools, it's just the opposite. The typical case is that partitions are used. And, for root pools, it is unlikely that the same disks have non-ZFS filesystems. The debdiff in comment #5 applies cleanly to the latest package and functions correctly. This is an important change for root-on-ZFS users. It has no effect on non-root-on-ZFS installs, because the code is only in the zfs-initramfs package. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/zfs-linux/+bug/1550301/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : email@example.com Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp