На cdfreaks подобралась команда из двух ребят, которые усиленно ковыряют прошивки LiteON (851s и 812s и их клоны). После ряда экспериментов и бета-версий они выложили "финальную" версию burn-fixed прошивки 851s, которая уже полностью готова к употреблению даже для 451s.
Цитата:
So what *exactly* is a burn-"fixed" firmware?
1/ For RICOHJPNR01 media, the fallback to 4x at the end of the burn has been fixed. This fallback has been known to cause problems in the form of high error rates, so we did away with it by fixing the writing strategy. And of course, this media type has also been bumped up to 8x.
2/ For the few other +R/-R media types that also suffer the fallback at the end of a burn, the fallback has now been changed to 6x (instead of a more dramatic 4x fallback). It has been found that a 6x fallback at the end is not as harmful as a 4x fallback. This fallback only affects a few media types, and as noted above, RICOHJPNR01 (a special case) will no longer suffer a fallback at all.
3/ For some (not all) +R (does not affect -R) media types on some (not all) burners, the burner will sometimes fail to shift up from 4x to 6x at the proper shift point. After this upshift fails, the 4x region is extended. In many cases, this failed upshift affects laser calibration adversely, and results in higher errors in the extended 4x region. This has been dealt with by fixing the problem in the firmware that was causing this failed upshift. The result is a faster burn and lower errors.
4/ For an improved +R (does not affect -R) burning speed, the 6x region has been shortened. The upshift to 8x now occurs at an earlier point. The result is a faster burn.
5/ The Ricoh R01/R02 strategy swap has been abandoned. First of all, the quality improvement was negligible. Most of the quality improvement came from the removal of the high errors caused by the various shifting problems. It was decided to keep using the R01 strategy because we have started to see a few RICOHJPNR01 discs that have problems with the R02 strategy. So instead of replacing the R01 strategy with the R02 strategy, we decided to just fix up the shifting problems in the R01 strategy instead. And besides, the Ricoh swap was just for Ricoh media. Fixing the shifting problem in general affects many more media types!
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Наверное, она не совсем финальная, т.к. сейчас все ее начнут тестить и постить результаты ;-) Мой привожу ниже.
Ricoh DVD+R
451s@851s GS0H burn-fixed (и speedhacked и book type preset to DVD-ROM) 3.7 Gb movie (на полный диск мне нечего было записать)
Media info
Код:
Disc Regions are * * * * * * * * * * * * * * * * * * * * *1,2,3,4,5,6,7,8
Media code/Manufacturer ID * * * * * * * * * * * * * * * * * *RICOHJPNR01
Media Product Revision Number * * * * * * * * * * * * * * * * * * * * 02h
Volume Name * * * * * * * * * * * * * * * * * * * * * THOMAS_CROWN_AFFAIR
Application id * * * * * * * * * * * * * * * * * * * * * * * LBY CLONEDVD
Implementation id * * * * * * * * * * * * * * * * * * * * * * * Stefan ID
Recording Date/Time (mm/dd/yyyy) * * * * * * * * * * * 5/22/2004 *1:24:36
Format Capacity * * * * * * * * * * * * * * * * * * * * * *3.69GB(3.96GB)
Book Type * * * * * * * * * * * * * * * * * * * * * * * * * * * * DVD-ROM
Media Type * * * * * * * * * * * * * * * * * * * * * * * * * * * * *DVD+R
Media Id Code Speed * * * * * * * * * * * * * * * * * * * * 4.0x 5540KBps
Data area starting sector * * * * * * * * * * * * * * * * * * * * *30000h
Data area end sector * * * * * * * * * * * * * * * * * * * * * * *1D863Fh
Linear Density * * * * * * * * * * * * * * * * * * * * * * * *0.267um/bit
Track Density * * * * * * * * * * * * * * * * * * * * * * * *0.74um/track
Number of Layers * * * * * * * * * * * * * * * * * * * * * * * * * * * *1
Media ID
Код:
00000000 08 02 00 00 01 0F 01 00 00 03 00 00 00 20 86 3F ............. .?
00000010 00 00 00 00 00 00 01 52 49 43 4F 48 4A 50 4E 52 .......RICOHJPNR
00000020 30 31 02 38 23 54 37 09 00 3C 67 00 AC 62 16 18 01.8#T7..<g..b..
00000030 0B 0B 0A 0B 01 19 1B 0B 0B 0E 0F 01 00 00 00 00 ................
Продавались как Maxell DVD+R 15 шт. в шпинделе. Made in Taiwan. Maxell вообще брэндит очень качественные болванки. -R у них свои MXL.
Привод неувернно прошел первую фазу, но после переключения на 6х и затем на 8х все просто супер. В принципе, тоже самое у меня было с фирменной (но speedhacked до 8х для определенных типов носителей) прошивкой GS0H. Если будет исправлена проблема записи на 4х, то можно будет считать работу выполненной на 5+.
