Best Practice with ZFS

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This article will introduce some practicality usage of ZFS file system.

Basic Usage

  • Create a pool

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    # create a striped pool
    sudo zpool create new-pool /dev/sdb /dev/sdc

    # create a mirrored pool
    sudo zpool create new-pool mirror /dev/sdb /dev/sdc

    # create a pool with specific mount point
    sudo zpool create -m /mnt/storage new-pool mirror /dev/sdb /dev/sdc

  • Set the mount point

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    sudo zfs set mountpoint=/mnt/storage new-pool

  • Check status

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    sudo zpool status

  • Destroy a pool

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    sudo zpool destroy new-pool

  • Import a pool

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    # scan existing pool
    sudo zpool import

    # import specific pool
    sudo zpool import new-pool

  • Create a filesysytem in a pool

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    sudo zfs create new-pool/new-fs

  • Destroy a filesystem in a pool

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    sudo zfs destroy new-pool/new-fs

  • List all filesystems in a pool

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    sudo zfs list

  • Set mount point for a filesystem

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    sudo zfs set mountpoint=/mnt/storage new-pool
    sudo zfs set mountpoint=/mnt/new new-pool/new-fs

Conditions

  • How to replace disk in a mirrored pool

    1. Shutdown system, replace the disk, then boot up

    2. Check the ID of disk with UNAVAIL status by executing

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      sudo zpool status

    3. Replace with new disk /dev/sdb

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      sudo zpool replace new-pool 4932927217405226991 /dev/sdb

    4. Check status and wait for resilvering

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      sudo zpool status

References

Setup a ZFS storage pool

How to replace a failed disk in a ZFS mirror