Solaris

# /etc/init.d/volmgt start
volume management starting.
# format
Searching for disks...done

AVAILABLE DISK SELECTIONS:
       0. c0d0 <DEFAULT cyl 1955 alt 2 hd 255 sec 63>
          /pci@0,0/pci-ide@7,1/ide@0/cmdk@0,0
       1. c2t0d0 <DEFAULT cyl 1021 alt 2 hd 128 sec 32>
          /pci@0,0/pci15ad,1976@10/sd@0,0
       2. c2t1d0 <DEFAULT cyl 2557 alt 2 hd 128 sec 32>
          /pci@0,0/pci15ad,1976@10/sd@1,0
Specify disk (enter its number): 2
selecting c2t1d0
[disk formatted]

FORMAT MENU:
        disk       - select a disk
        type       - select (define) a disk type
        partition  - select (define) a partition table
        current    - describe the current disk
        format     - format and analyze the disk
        fdisk      - run the fdisk program
        repair     - repair a defective sector
        label      - write label to the disk
        analyze    - surface analysis
        defect     - defect list management
        backup     - search for backup labels
        verify     - read and display labels
        save       - save new disk/partition definitions
        inquiry    - show vendor, product and revision
        volname    - set 8-character volume name
        !<cmd>     - execute <cmd>, then return
        quit
format> part
WARNING - This disk may be in use by an application that has
          modified the fdisk table. Ensure that this disk is
          not currently in use before proceeding to use fdisk.

format> fdisk

it gives me this result :
format> fsck
`fsck' is not expected.