# prtvtoc /dev/rdsk/c0t4d0p0
* /dev/rdsk/c0t4d0p0 EFI partition map
*
* Dimensions:
*     512 bytes/sector
* 5860533168 sectors
* 5860533101 accessible sectors
*
* Flags:
*   1: unmountable
*  10: read-only
*
* Unallocated space:
*       First     Sector    Last
*       Sector     Count    Sector
*          34       222       255
*
*                          First     Sector    Last
* Partition  Tag  Flags    Sector     Count    Sector  Mount Directory
       0      4    00        256 5860516495 5860516750
       8     11    00  5860516751     16384 5860533134


# format /dev/rdsk/c0t4d0p0
selecting /dev/rdsk/c0t4d0p0
[disk formatted]
/dev/dsk/c0t4d0s0 is part of active ZFS pool pool. Please see zpool(1M).
...
partition> p
Current partition table (original):
Total disk sectors available: 5860516717 + 16384 (reserved sectors)

Part      Tag    Flag     First Sector          Size          Last Sector
  0        usr    wm               256         2.73TB           5860516750
  1 unassigned    wm                 0            0                0
  2 unassigned    wm                 0            0                0
  3 unassigned    wm                 0            0                0
  4 unassigned    wm                 0            0                0
  5 unassigned    wm                 0            0                0
  6 unassigned    wm                 0            0                0
  8   reserved    wm        5860516751         8.00MB           5860533134

partition>