1    /ANALYZE

    Displays information about the number of fragments in INDEXF.SYS
    and the largest contiguous free space. If INDEXF.SYS can not be
    defragmented a "%DFU-W-NOOPT" message will be displayed.

2    /DEFRAG

    Starts a defragment operation on INDEXF.SYS. The disk must be
    clusterwide dismounted before starting a defragment operation.

3    /EXTEND

    /EXTEND=n (number of blocks)

    Extends INDEXF.SYS with 'n' blocks in 1 new fragment. This is
    equivalent to 'n' extra file headers. The disk must be clusterwide
    dismounted before starting an extend operation.
    The 'n' value will be rounded up to be a multiple of the device
    cluster size.

4    /SHADOW_MEMBER

    /SHADOW_MEMBER=device:

    The physical member of the shadowset on which to perform an
    EXTEND or DEFRAG operation. This qualifier is only required
    in combination with /DEFRAG and /EXTEND. Example :

    DFU> INDEXF/DEFRAG DSA0:/SHADOW_MEMBER=$1$DUA104:

5    /SHOW_POINTERS

    Displays all mapping pointer information during the analyze phase.

6    /STATISTICS

    /STATISTICS
    /NOSTATISTICS (default)

    Controls whether cpu and I/O consumption of the
    command are shown.

7    /TRUNCATE

    If possible the INDEXF.SYS file will be truncated back to
    the end-of-file size. The disk must be dismounted to
    perform this operation.