[Mistral:~] fritz% sudo zpool
Read-Only ZFS Implementation
missing command
usage: zpool command args ...
where 'command' is one of the following:

    list [-H] [-o field[,field]*] [pool] ...
    iostat [-v] [pool] ... [interval [count]]
    status [-vx] [pool] ...

    online <pool> <device> ...
    offline [-t] <pool> <device> ...

    scrub [-s] <pool> ...

    import [-d dir] [-D]
    import [-d dir] [-D] [-f] [-o opts] [-R root] -a
    import [-d dir] [-D] [-f] [-o opts] [-R root ] <pool | id> [newpool]

    history [<pool>]

[Mistral:~] fritz% diskutil eraseDisk
Disk Utility Tool
Usage:  diskutil eraseDisk format name
        [OS9Drivers|APMFormat|MBRFormat|GPTFormat]
        MountPoint|DiskIdentifier|DeviceNode
Completely erase an existing whole disk.  All volumes on this disk will be
destroyed.  Ownership of the affected disk is required.
Format is the specific filesystem name you want to erase it as (HFS+, etc.).
Name is the (new) volume name (subject to filesystem naming restrictions),
or can be specified as %noformat% to skip initialization (newfs).
You cannot erase the boot disk.
Example: diskutil eraseDisk UFS UntitledUFS disk3
Valid filesystems: "Journaled HFS+" "HFS+" "Case-sensitive HFS+" "Case-sensitive Journaled HFS+" "HFS" "MS-DOS FAT16" "MS-DOS FAT32" "MS-DOS FAT12" "MS-DOS" "UDF" "UFS" "ZFS"

diskutil partitionDisk /dev/disk3 1 GPTFormat ZFS aa 100%

Started partitioning on disk disk3
Creating partition map
Formatting disk3s1 as ZFS File System with name aa
[ / 0%................................................... ]
Partitioning encountered error on disk disk3s1: The chosen size is not valid for the chosen filesystem (-9962)