DVD sector scrambling

vbimport

#1

i checked out the ecma-267 specification. 35th page refers about the sector scrambling of dvds. is there a code implementing the dvd sector scrambling (like the very usefull one by spath for the cd).
now i think this may be answered before

  1. is weak sectors possible in dvds
  2. if not why

#2

They are possible and there are some on safedisc DVDs, contained in the 00000001.TMP file. When this file is burnt to a DVD it produces a bunch on PI failures.


#3

thank u docdocdoc.
btw ne chance u can give me that safedisc 0000001.tmp file cos i tried and it seems i cant get ne safedisc protected dvds in my country


#4

I don’t think that safedisc DVD protection is based on weak sectors, I checked a few safedisc DVD there were no bad sector after burning.

Olivier


#5

ok oliver
i was asking is there a possibility of weak sectors in a DVD.


#6

Some info about sector scrambling on DVD:

http://www.pioneer.co.jp/crdl/tech/dvd/2-3-e.html

According to it, each sector is XORed with a different pattern, depending on the sector number. This makes creation of DVD weak sectors much more difficult, but again not impossible.

BTW here are some old scans of a (failed of course) copy of a safedisc DVD (POP warrior within - safedisc 4.00.001) on a DVD-R.




#7

Thank you docdocdoc
I will look into the link u provided n will post if i could write up some code upon that.
btw could u send me that 000001.tmp file (safedisc) u were talkin bout.

Apart from that yahoooo! the english r playin well in the ashes!


#8

For the official specifications check this instead :

I’ve sent you the file by PM.