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1

@jlliagre and others who seem to think that the entire zpool dies if it one of the disks (vdevs) dies but the pool is not redundant (mirror/raidz). This is not true; a multi-disk pool will always survive a single complete disk failure even if it is not a mirror or raidz. ZFS Metadata is always copied at least 2 times so total failure of a complete disk (or ...


1

I know this is an old question, but it gave me a few of the pieces I put together, and i thought i'd shoot back the script i came up with, since this is an almost exact match to my situation: it requires sas2ircu: http://www.avagotech.com/docs-and-downloads/host-bus-adapters/host-bus-adapters-common-files/sas_sata_6g_p20/SAS2IRCU_P20.zip and from the ports, ...


0

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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Check /etc/default/zfs and make sure it's set to: ZFS_MOUNT='yes' ZFS_UNMOUNT='yes'


-1

I really dont see the point of adding PCIe SSD. If you like to have a low latency device for SLOG and you need to have it on PCIe then I believe the only option is DDR-Drive. Adding more RAM will only do it if you set your pool to sync=disabled which is something that I really don't recommend.


0

Did you try to restart the machine? Did it any difference? If a restart did not help, what you are facing can be a problem with excessive fragmentation, which is #1 enemy for rotating media (read: HDDs). The high number of snapshot can exacerbate this situation. To confirm the issue, try the following: create a new similarly sized file with the command ...


1

More RAM might be a good option. If read performance is not critical, but metadata operations are: I would recommend setting "primarycache" to "metadata" for your filesystems. If you have SSDs for L2ARC, you can also choose to use memory (ARC) for caching "all" and secondarycache (L2ARC) as "metadata". Please note that the other way around does not work ...


0

Please try zpool offline zpool detach e.g. for the first post zpool offline RAID 17164957131155215254 zpool detach RAID 17164957131155215254


0

I try to sum up the given information and give some explanation (where I know, what it means): About the zpool list output: SIZE is the size of all discs, including the discs used for redundancy (so together with the output of zpool status that means, you have put together 8 3TB drives in a RAID-Z3 configuration) ALLOC is the used space, also including the ...


1

I read on the freebsd forums a post which suggested to use zfs online -e <pool> <vdev> (without needing to offline the vdev first) This ultimately was the solution, but it required that ZFS autoexpand be disabled first: [root@timestandstill ~]# zpool list NAME SIZE ALLOC FREE CAP DEDUP HEALTH ALTROOT dfbackup 214G 207G ...



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