cfgadm is for hot plugging devices. Assuming you install them while the server is powered off, if the new disks do not show up at reboot with iostat -En, just run devfsadm -v and they should.
You...
zpool create name disk1 disk2will create ZFS pool and ZFS filesystem and it will mount it under /name. You will be able to create additional ZFS filesystems using zfs create name/new_fs_namethat will...
Yes, that's a great idea DukeNuke2. Forget what said, that should be easier. Do you know whether your O/S is on UFS or ZFS? Doesn't matter if you don't mind mixing it up. It will give you a...