QUOTE
The Xtreme v3 for the Samsung TS-H943 strips off the 4 byte header automatically and returns 2048 bytes (1 sector worth of data) but the mmc spec contains a 4 byte header to tell you the length of the data returned, in our case it is 0x08 0x02 0x00 0x00 which tell us our buffer is 2050 bytes after the 2 byte length field. The Xtreme v3 firmware gives back 2048 bytes of this EXCLUDING the header (2 bytes length, 2 bytes reserved). Now say you use DVDInfo to extract the PFI and DMI on any drive that is not the Xtreme v3 TS-H943, then your sectors are not in the same format, unless you use my app as it will offset the data by 4 and also gets the extra 4 bytes at the end that DVDInfo chops off. Now in my testing DVDInfo doesn't return more than 2048 bytes so it is hard for you to get those 4 bytes off of the end of the buffer without my tool. DVDInfo isn't really wrong, as it is giving you what the drive gave it, it just doesn't do the extra processing and expects you to know the data format of your request.
To recap...2050 (0x08 0x02) bytes after the 2 byte length field is 2052, now minus the first 4 bytes which are not part of the sector it's self gives us 2048 bytes.
So unless you're using a TS-H943, DO NOT use DVDInfo to get the PFI & DMI; use Redline99's drive tools instead.