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I'm running ZFS on Linux on my workstation, and have been for about two years:

[ 273.779699] SPL: Loaded module v0.6.4.2-1~vivid [ 273.824212] ZFS: Loaded module v0.6.4.2-1~vivid, ZFS pool version 5000, ZFS filesystem version 5 [ 280.179534] SPL: using hostid 0x007f0101

It works great, except that a couple of months ago I upgraded to Ubuntu 15.04. When I rebooted after the upgrade, the ZFS pool was not seen. At first I panicked, but when I had zpool search my devices it found the missing pool. Running "zpool import store" works fine, and everything mounts as it ought to. Until the next time I reboot.

Everytime I reboot ZFS appears to forget about my pool. However, I can't see anything obviously wrong:

$ sudo zpool list -Hv store 1.30T 301G 1.00T - 22% 22% 1.17x ONLINE - sda4 432G 135G 297G - 31% 31% sdb3 896G 167G 729G - 19% 18%

I also don't see anything obviously wrong in the partition tables:

$ sudo parted -l Model: ATA ST500DM002-1BD14 (scsi) Disk /dev/sda: 500GB Sector size (logical/physical): 512B/4096B Partition Table: gpt Disk Flags: Number Start End Size File system Name Flags 1 1049kB 512MB 511MB fat32 EFI System Partition msftdata 2 512MB 35.5GB 35.0GB ext4 4 35.5GB 500GB 465GB zfs Model: ATA WDC WD1002FAEX-0 (scsi) Disk /dev/sdb: 1000GB Sector size (logical/physical): 512B/512B Partition Table: gpt Disk Flags: Number Start End Size File system Name Flags 1 1049kB 10.0GB 9999MB linux-swap(v1) 2 10.0GB 35.0GB 25.0GB xfs 3 35.0GB 1000GB 965GB zfs

Any guidance about where to look, or what to do would be very much appreciated.

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3 Answers 3

Reset to default
2

Check /etc/default/zfs and make sure it's set to:

ZFS_MOUNT='yes' ZFS_UNMOUNT='yes'

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  • This doesn't solve the problem. When I reboot 'zpool list' is empty and I have to import it by hand. I have also read documentation to the effect that these are no longer necessary (although I did try them again, just to be sure.) Commented Jul 27, 2015 at 15:01
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Be sure to have ubuntu-zfspackage installed, as it provides the correct pinning for the mountallcommand. See https://github.com/zfsonlinux/pkg-zfs/wiki/Ubuntu-ZFS-mountall-FAQ-and-troubleshooting for more details

AND/OR

have a look into and change /etc/init/zpool-import.conf

modprobe zfs zfs_autoimport_disable=1

to

modprobe zfs zfs_autoimport_disable=0

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  • I already had ubuntu-zfs installed. The zfs_autoimport_disable flag was set to 1, so I set it to 0 and rebooted. I still had no pools listed. I also removed the zfs module from modprobe.d list as suggested by the common mistakes. Still no joy. I'll look at some of the other suggestions later. Thanks, though! Commented Jul 27, 2015 at 15:52
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I updated the ZFS packages this week and the problem simply vanished. It must have been a bug somewhere that got fixed. Everything is good again.

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