2TB disk installed in Sun Fire T1000

Output from format -e
c0t0d0: configured with capacity of 1862.95GB


AVAILABLE DISK SELECTIONS:
       0. c0t0d0 <ATA-HitachiHDS72302-A800 cyl 60798 alt 2 hd 255 sec 252>
          /pci@7c0/pci@0/pci@8/scsi@2/sd@0,0

Output from df -h
Filesystem 									size   used  avail capacity  Mounted on
rpool/ROOT/s10s_u10wos_17b 	1.8T   4.5G   1.8T     1%    /