ZFS Backup Server: Getting Started

Create a zpool and ZFS filesystem

You will need 1 zpool with 1 zfs filesystem to store the backup data. You can use any existing zpool. The backup script does not require it's own pool. zpool creation is fairly straight-forward:
    # zpool create tank devname1 [devname2 ...]
So if you have a slice at /dev/rdsk/c0t1d0s1 available, run:
    # zpool create tank c0t1d0s1
You can add as many devices into the zpool as you like and by default it will create a stripe of sorts. If you want to mirror two devices:
    # zpool create tank mirror c0t1d0s1 c0t2d0s1
To view the new zpool, use the "zpool list" command:
    # zpool list
    NAME                    SIZE    USED   AVAIL    CAP  HEALTH     ALTROOT
    tank                   2.17T   2.01T    161G    92%  ONLINE     -
Now create a new ZFS filesystem on your zpool and specify a mountpoint:
    # zfs create tank/backup
    # zfs set mountpoint=/backup tank/backup
Now you can see your filesystem using the zfs list command:
    # zfs list
    NAME                        USED  AVAIL  REFER  MOUNTPOINT
    tank                       2.01T   126G  25.5K  none
    tank/backup                1.84T   126G   450G  /backup
If you use these default names and mountpoints, the backup script is already set up. If you've modified anything, edit the top of the ypass-backup file with the appropriate names.