Usage Notes
Consider the following when specifying the File Read parameters:
Requirements – A File Read function is required when the Reqtype field of the pmiCmdBlock_t structure is pmiPIDMOptRead.
BlkHeaderLen Value – The returned BlkHeaderLen value indicates the number of bytes at the beginning of each block returned on read
operations that are Access Module specific. If, for example, the Access Module needs
to prefix each record with a four‑byte block length and that block length was present
at the beginning of the returned read buffer, then the BlkHeaderLen is set to 4. If, however, the Access Module does not include that field in its returned
data, then the BlkHeaderLen value is set to 0.