請善用google,只會要人給魚吃,學不到什麼東西

What is DVDScan
DVDScan is a disc analysis tool written by a LiteOn employee Tom (Wind acts as his spokesman in addition to his work on firmware). It offers various diagnostics for DVD media:

* PI/PIF with PI or PISum8. This reports the activity of the error correction
* Jitter and timing analysis, describes the variation of the lengths of the pits and lands from the ideal values
* Beta (asymmetry of short and long pits/lands)
* TE/FE (tracking error and focus error)


Although CD and BD are shown as disc types, neither is supported at present. The tool shows the MID of the DVD medium inserted.

What is required
To run DVD-Speed you need:

* the program ()
The newest version will generally be linked in the first post in the CDFreaks thread New Toy: DVDScan and Feedback Here.
An early package didn't include the file IEEE_32M.DLL, but the mirror at CDFreaks now has it.
* a newer LiteOn drive, generation 5S or 6S (look at the last 2 digits of the model number), e.g. SHM-165P6S
* a firmware version that supports the tests.
At present this usually means a test firmware as supplied by Wind (a very communicative LiteOn employee). To get the newest flavours available, see the thread Test Firmware ANNOUNCEMENTS.
Owners of the 1635S and 165P6S are fortunate in that the lastest official firmware YS0Z and MS0P supports these tests. These are also available at the codeguys website.