You can eliminate any known hard drives by the ones displayed in your zpool by typing "zpool status". Now you need a mount point, cd to /mnt and make a/some directories for your hard drives, e.g.: hd1, hd2 etc. Now for the fun part, type in "mount -t ntfs /dev/adaX /mnt/hd1" substituting in adaX for whatever device your hard drive is.