File Structure for persisting history in a disk file (Comments please)

Hello, I want to use the following file structure for persisting history in a disk file. Can you please send me your feedback about it. Thanks Raji Bommaraju _File structure for History Persistance_ History information will be stored in a disk file. The file will have a File Header consisting of "Bytes Stored" and "Head" for writing the next record.Each record stored will have record header and record data, record header has "record type" and "size of the record" (For Text messages the records will have variable length message data resulting in variable length records) hence this record structure is used. *File Format:* |File Header| Data | File Header (8 bytes): |Bytes stored | Head| 0 4 8 *Data:* |Record|Record|.....etc *Record:* |Record Header|Actual data| *Record Header:* Record Type: 1byte (voice call history - 0, text history- 1) Size : Integer Actual data: Will be voice call or text message information