Drestore checks the magic number to insure that you gave it a valid log file. The version number is used to verify that the version of drestore and the version of the software that wrote the log file are compatible. After the magic number and version number come the actual entries. The argument is not always present. In that event, the size of the argument is zero.
Every entry begins with a standard header.
The process ID of the program making the entry. It will always be zero on MS-DOS systems. The actual log record follows the header. The remainder of this section describes the format of each log record and when the record is written to the log file. The first entry a program makes in the log file is a process identification entry.