1    /BESTTRY

 This qualifier directs DFU to create a file using the contiguous-best-try
 method. Default DFU tries to make a completely contiguous file. On highly
 fragmented or used disks this may be impossible.

2    /DEVICE=device_name

 Append the device-name to the filename.

3    /LBN=<logical-block-number>

 Move a single file to the target logical block number. This is faster
 than having the file system search for a new LBN location.
 Caution: Use this qualifier only for processing a single file, not
 a list of files. If there is not enough contiguous free space
 available at the target LBN Defrag will fail with a
 DEVICEFULL error.

4    /STATISTICS

    /STATISTICS
    /NOSTATISTICS  (default)

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

5    /WRITECHECK

    /WRITECHECK
    /NOWRITECHECK  (default)

    Performs a write check on the resultant file after the defragment
    operation.