Public bug reported: Updated to artful (17.10) yesterday. Trying to read (play video) from mirrored ZFS disks from an external USB 3 enclosure. Zpool is defined as: root@hetty:/home/crlb# zpool status pool: storage state: ONLINE scan: resilvered 20K in 0h0m with 0 errors on Fri Oct 20 18:38:49 2017 config:
NAME STATE READ WRITE CKSUM storage ONLINE 0 0 0 mirror-0 ONLINE 0 0 0 sdb ONLINE 0 0 0 sdc ONLINE 0 0 0 errors: No known data errors root@hetty:/home/crlb# Found that I could re-create the problem with: rsync -av --progress <zfs_file> <internal_ext4_path> Also found that: dd if=/dev/sdX of=/dev/null status=progress bs=1024 count=10000000 Where "X" is either "b" or "c" does not hang. Installed: root@hetty:/home/crlb# apt list --installed | grep -i zfs libzfs2linux/artful,now 0.6.5.11-1ubuntu3 amd64 [installed,automatic] zfs-zed/artful,now 0.6.5.11-1ubuntu3 amd64 [installed,automatic] zfsutils-linux/artful,now 0.6.5.11-1ubuntu3 amd64 [installed] root@hetty:/home/crlb# Help please. ** Affects: zfs-linux (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1725859 Title: zfs frequently hangs (up to 30 secs) during sequential read To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/zfs-linux/+bug/1725859/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs