Solaris Zpool
root@edus008:/rpool # zpool status rpool pool: rpool state: ONLINE scan: resilvered 37.8G in 0h6m with 0 errors on Fri Nov 9 13:37:50 2012 config: NAME STATE READ WRITE CKSUM rpool ONLINE 0 0 0 mirror-0 ONLINE 0 0 0 c3t0d0s0 ONLINE 0 0 0 c3t1d0s0 ONLINE 0 0 0 errors: No known data errors root@edus008:/rpool # zpool add -f rpool mirror /dev/dsk/c3t2d0 /dev/dsk/c3t3d0 cannot label 'c3t2d0': EFI labeled devices are not supported on root pools. If root rpool exists, additional devices must be attached; can NOT be added. And pelase use the parition (c0t1d0s0) to attach; not the disk (c0t1d0) root@edus009 # zfs create rpool/woodstock root@edus009 # zfs list NAME USED AVAIL REFER MOUNTPOINT ais_local 181K 268G 115K /ais_local rpool