/B[LOCK]=block number
Directs DSE to OVERWRITE a specific block. If no block number is specified, the default is the current block.
/D[ATA]=string
Specifies the data to be written. Use quotation marks around string and escape codes of the form or b, where a and b are hexadecimal digits, for non-printing characters. translates to a single backslash.
/O[FFSET]=offset
Specifies the offset in the current block where the overwrite should begin.