301

(29 replies, posted in General discussion)

A mode 2 data track can have a combination of mode 2/form 1 frames (For normal data, 2048 bytes of user data/sector) and form 2 frames (For audio/video, 2324 bytes of user data/sector). You can dump it directly with IsoBuster, of course.

By the way, I remember Hitachi-LG drives with Renesas chip (The ones with +667 in Accuraterip database) can extract such last sector without neeeding workarounds.

302

(29 replies, posted in General discussion)

If your drive has a correction offset value of +6 and factory write offset is +2, combined correction offset is +8, 32 bytes (You can, pottentially, miss 8 bytes at the end, not beggining, of disc). Thus, if you use audio trap disc, you can extract 0 - 50197 range using CDTool (With C2 reporting enabled, subchannel reading (Raw mode and deinterleaving enabled) and Main+Sub+C2 read order). You have to substract 32 bytes at the beginning of dump and append 32 zeroed bytes in the end. Start of a data track scrambled is always 00 FF FF FF FF FF FF FF FF FF FF 00 01 82 00. (00 FF FF FF FF FF FF FF FF FF FF 00 02 00 00 once descrambled).

Then, open SubCode Analyzer, load .sub and make CUE file. This CUE file is useful for spliting dump with CDMage and, then, descramble data track. If everything is fine (Tracks properly cutted, no missing data...), you will get a match. With trap disc method and my Pioneer drive I have dumped several discs for my personal archive and they match database.

Every utility noted is here:
http://forum.redump.org/topic/5272/tools-of-the-trade/

PS: As far I know, also IsoBuster extracts ranges in burst mode, not single sector mode.

303

(29 replies, posted in General discussion)

If your drive has a correction offset value of +6 and factory write offset is +2, combined correction offset is +8, 32 bytes (You can, pottentially, miss 8 bytes at the end, not beggining, of disc). Thus, if you use audio trap disc, you can extract 0 - 50197 range using CDTool (With C2 reporting enabled, subchannel reading (Raw mode and deinterleaving enabled) and Main+Sub+C2 read order). You have to substract 32 bytes at the beginning of dump and append 32 zeroed bytes in the end. Start of a data track scrambled is always 00 FF FF FF FF FF FF FF FF FF FF 00 01 82 00. (00 FF FF FF FF FF FF FF FF FF FF 00 02 00 00 once descrambled).

Then, open SubCode Analyzer, load .sub and make CUE file. This CUE file is useful for spliting dump with CDMage and, then, descramble data track. If everything is fine (Tracks properly cutted, no missing data...), you will get a match. With trap disc method and my Pioneer drive I have dumped several discs for my personal archive and they match database.

Every utility noted is here:
http://forum.redump.org/topic/5272/tools-of-the-trade/

PS: As far I know, also IsoBuster extracts ranges in burst mode, not single sector mode.

304

(29 replies, posted in General discussion)

A drive can overread in EAC, but not in IsoBuster/PF, and viceversa. I guess EAC uses a distint method for overread. For examble, my LH-20A1P can overread into lead-in/out in PF/IsoBuster/dbPowerAMP/CDTool/Nero CD Speed's test, but not in EAC. Whereas my GCE-8526B can overread into lead-in/out only in EAC.

Overread into Lead-in may be useful for discs with negative combined offset.

305

(29 replies, posted in General discussion)

DVD-129P is Mediatek based (+6 in AccurateRip). If that drive can overread into lead-in and lead-out, it is suitable for PF.   You can use IsoBuster's sector viewer for testing:
-If you can go to negative LBA such as, -1, -2 (Until -150/-149, more or less)... drive can overread into lead-in.
-If you can go past last LBA of disc, until a certain ammount of sectors, drive can overread into lead-out.

And Retrogamer is right. I have lots of PSXs discs which I cannot dump (I speak of data track, not audio tracks) properly with my Pioneer DVD writer, NEC based, because of last sector. The only drive I own which doesn´t screw up last sector is my Panasonic/Matshita SR-8586B (VOS based).

306

(29 replies, posted in General discussion)

Only true Plextors can use 100b (Packed mode). 001b is raw mode, pretty standard. Unfortunately, Pioneer drives cannot overread into lead-in (Needed for PF and mixed mode CDs).

Once you master audio trap disc method, it works very fine (No more data tracks screwed up by drive chipset's misinterpretations) and you won´t need a very expensive and hard to get true Plextor drive for properly dumping certain discs.

307

(29 replies, posted in General discussion)

I own a very similar Pioneer drive and audio trap disc method works flawlessly, without removing drive case. Also, PerfectRip runs fine, but only with pure CDDA discs.

You need a true Plextor drive (Sanyo chipset). For example any PX-7xx, except 740, 750 and 751. Today, Plextor drives are actually others (Lite-On, LG, Pioneer, NEC...) rebranded by Plextor and they doesn´t offer any special feature.

309

(7 replies, posted in General discussion)

Try CDTool.

http://www.cdtool.pwp.blueyonder.co.uk/downloads.htm

The option you have to employ is "CD to image". Set first sector to 45000 and press From TOC. Then, choose this options (I assume that everybody has a decent drive which can read subs and report C2 errors):
-Subchannel: (001b) and check Deinterleave subs.
-C2 error reporting: 01b.
-C2 error reporting read order: If you have a Mediatek based drive (+6/+12 in Accuraterip DB), select Main+Sub+C2. Otherwise, CDTool will interchange, wrongly, C2 and sub files.

Try several read speeds in order to determine the optimal. When dumping is finished, the .C2 file created mustn´t have any non-null byte. If so, there are errors in process of dumping. Fortunately, modern Mediatek drives has superb error correction. They can read in a go discs relatively damaged without errors. Unless you have a heavily damaged disc, you should obtain a clean dump if everything goes well.

310

(7 replies, posted in General discussion)

If you use a trap disc based on Mode 1 track, you can only dump data tracks (Already unscrambled and offset corrected), not audio tracks. I prefer a trap disc based on audio track, you can dump everything (Data track will be neither unscrambled nor offset corrected). However, ice.exe unscramble, correct offset and split the dump.

I think you can try another type of media for trap disc, like a CD-RW. You can erase it and burn once more if required this way. From my experience, CD-RW's gave me better results than conventional CD-R's.

311

(7 replies, posted in General discussion)

Maybe you have to run it with administrator privileges (Because startstop is using a low level interface, SPTI), or another program is locking the drive (For obtaining exclusive access).

2 / 04 / 01   is   LOGICAL UNIT IS IN PROCESS OF BECOMING READY, though. You can see this message in ImgBurn when you insert a disc and drive doesn´t recognize yet.

Finally, which USB enclosure do you have? Many USB adapters don´t support ATAPI properly.

312

(2 replies, posted in General discussion)

HL drives with Renesas (Offset correction of +667 samples/2668 bytes) can not overread into lead-out, only into lead-in. That is worthless (At first) for a drive with a positive offset correction. So your drive potentially can miss that amount of samples at the end.

However (Relatively speaking), few discs which I have ever seen have non-null samples at the very end of disc. In my collection, the only disc which requires a drive with overread into lead-out (Or a drive with negative offset correction, such as a Toshiba SD-M1702) in order to read properly the last track is Alien Trilogy for PC.

In a few of ( Very rare) cases, you could verify the lead-in (Actually pregap of track 1) and lead-out sections (If you drive can), and tweak the offset correction value to read properly the whole disc.

I have this particular CDDA to clarify my statement:

-In many CDDAs, there are a large margin of zeroed sectors before music starts. This CDDA is different, music starts at LBA -1 (According to my HL with Renesas drive and Isobuster´s sector view, which doesn´t performs offset correction), before of LBA 0. Using the standard value of offset correction drive misses the music start (586 samples at LBA -1, 588 samples at LBA 0 and 79 samples at LBA 1), so I have to use a non-standard value of -586 (Negative) samples in this particular CDDA: -588 samples of a full sector + 2 first null samples at LBA -1:

A positive offset correction value delays the start of disc the specified amount of samples (588 samples=Full sector)
A negative offset correction moves forward the start of disc.

http://img208.imageshack.us/img208/3742/lba2.th.png
http://img834.imageshack.us/img834/901/lba1.th.png

313

(10 replies, posted in General discussion)

A CD-RW (Lesser reflective than a CD-R or pressed CD) media needs a more powerful laser calibration to be read, so drive set a higher laser power if you use a one of this.

Generally, if you can use the attached drive for "advanced" things such as reading subs, C2 pointers... the adapter is fine for ODDs.

314

(10 replies, posted in General discussion)

With a Scythe IDE/SATA to USB (JMicron based, ODDs runs fine with this) and NEC DV-5800E (Crossflashed to LT SHD-16P1S, Mediatek based DVD-ROM, like  SH-D162C) I can perform the trap disc (Burned in a Samsung CD-RW disc manufactured by Daxon, others) methode (Removing the cover and stoping the unit using startstop) and dump the high density area. However, the GD-ROM which I own is too damaged and (Once descrambled by ice.exe), so, the data tracks doesn´t match the ones in Redump´s database, whereas the audio tracks does.

At least as far as I tested, the optimal read speeds were 16x or 24x. Others only gave a lot of errors. I dumped the GD-ROM using CDTool by Truman (Setting manually the desired range to dump), which also allow the use of C2 pointers as a additional layer for catching read errors.

IMHO, you should try another disc for burn the trap disc. Maybe, you are employing a wrong type of media. I had to try lots of discs, until I found the correct one, the 10x Samsung CD-RW by Daxon I currently own for trap disc. Moreover, the IDE to USB adapter you are using is critical too. As far as I know, many IDE to USB adapters doesn´t operate properly with ODDs (ATAPI) drives.

315

(4 replies, posted in General discussion)

Why not polish the surface using a car polishment or alike? I managed to repair a lot of damaged CDs with this method.

You can repair the scratches in the bottom side using a polishment (Rub from the centre to the edge of disc, never radially), except if reflective layer is damaged (Label side). Remove polishment´s leftovers using alcohol and dry the CD.

Moreover, you can try a Lite-On or TSST drive (With Mediatek chipset, +6 in AccurateRip´s list). In my experience, they can read flawlessly damaged discs that other drives cannot read.