1

(4 replies, posted in General discussion)

00 00 00 00 00 00 00 00 00 00 00 00 00 00 01 19 01 00 05 00 00 06 26 10 09 9B
00 00 00 00 00 00 00 00 00 00 00 00 00 00 01 19 01 00 05 01 00 06 26 11 B3 EB
00 00 00 00 00 00 00 00 00 00 00 00 00 00 02 00 00 00 00 00 00 00 00 12 13 06
00 00 FF FF FF FF FF FF FF FF FF FF FF FF 01 20 00 00 01 74 00 06 26 13 DA D4
00 00 FF FF FF FF FF FF FF FF FF FF FF FF 01 20 00 00 01 73 00 06 26 14 CD E7

Quite a standard case, the first sector of the track has its Q-channel replaced with EAN data, P-channel should be used in this case (and it shows the sector belongs to track 20 in this case, so the gap is 00:02:00). Redumper has wrongly assumed it belongs to track 19.

2

(3,493 replies, posted in General discussion)

sarami wrote:
F1ReB4LL wrote:

the log is full of "Subchannel & TOC doesn't sync." messages, but no "Sub Indexes" tracks/cue created? Why?

I dumped Tengai Makyou: Ziria(http://redump.org/disc/37134/) and "Sub Indexes" are dumped. I'm not sure why Ys Book I & II (USA) are not dumped.

Can you add more debug info logging to understand the problem?

3

(3,493 replies, posted in General discussion)

https://drive.google.com/file/d/1cikxNb … 4O5P6/view - the log is full of "Subchannel & TOC doesn't sync." messages, but no "Sub Indexes" tracks/cue created? Why?

4

(14 replies, posted in General discussion)

superg wrote:

I don't think we are on the same page here. There are no duped sectors and it's not random garbage. They are real damaged sectors with reasonable LBA. Do you want to see some bytes? I believe I can demonstrate.

I wasn't talking about "random garbage" - as I've said, it often appears when smb burns a disc, dumps it and burns again at some point of its mastering process, so the scrambled sector leftovers appear and it is quite common when some sector presents on the disc properly and has some additional garbage leftovers with exactly the same bytes, just duped. Descrambling those will result in duped sectors.

Also, you wasn't talking about "damaged" sectors, but about shifted ones. There are cases when the scrambled sectors aren't shifted, but are damaged (or both shifted and damaged), it's a different story. I think the damaged sectors are still descrambleable, unless either filled with some random or padded with non-random bytes.

superg wrote:
F1ReB4LL wrote:

The main dump should be always left as is, with anything unusual left scrambled.

This is (1), you're talking about, this is exactly what you want. But I am saying that this is not what DIC does today and sectors from that damaged portion are half scrambled half descrambled.

DIC is supposed to only work with 2352-byte pieces starting with byte 0 of sector 0 ignoring any shifts, so any sector is supposed to be either descrambleable (if no shifts) or not descrambleable (if there are shifts). If sarami has changed this logic, it's better to call him into this discussion for explanations. Half scrambled/half descrambled may appear when there are no shifts, but there are sector damages, like I've mentioned above, if you're talking about that kind of cases, that behavior is correct.

5

(14 replies, posted in General discussion)

superg wrote:

As some of you are already aware, some CD's have a mastering issue where write offset changes across the disc. For the standardization purpose, I will be calling that "offset shift".

That's an incorrect term. There's only 1 offset per disc, while you're talking about leftovers from earlier burning/dumping mastering stages. Those leftovers are physically present on the disc and need to be kept, since they belong to the disc data.

superg wrote:

Here's how that can be handled:
1. Leave transitional sectors intact.
2. Force descramble of all transitional sectors
3. Intelligently detect if the sector is scrambled based on a combination of content criteria and if it is, try to descramble it.

All 3 are wrong, since those leftovers often contain duped data and a plain descrambling will lead to duped sectors. Also, there are quite a lot of cases when those leftovers appear as a part of a first post-data audio track, like http://redump.org/disc/7986/

The main dump should be always left as is, with anything unusual left scrambled.

As for the additional "(Fixed)" dumps we've discussed eariler, you should probably try to descramble all the sectors, but the descrambled sector shouldn't be added into the dump, if exactly the same sector already exists in the descrambled dump (not to be confused with the twin sector-based protections, when there are 2 different sectors with the same headers exist).

There are also cases, when such sector shifts appear in pregap (sectors -150 to -1), so we're loosing a part of vital data for them by not preserving that area - http://redump.org/disc/73334/ as an example. Disc offset (= pregap offset) goes to the "Write offset" in this case and the "new" user area offset goes to the comments. Since we're not preserving the pregap, such discs aren't added as fully scrambled, but it's the only exception, all the other cases should be added as a pair of unfixed + fixed dumps (also, such a pair is a workaround and ideally I would replace them with a pair of scrambled + descrambled dumps).

Whether to fix the ones with garbage data in audio and add as (Fixed) is upto you. If there's a shifted piece of actual audio data in the lead-out area, probably worth to.

6

(5 replies, posted in Guests & account requests)

CD32 better to redump everything from scratch, the current dumps are very old, not even sure all of them are reliable.

7

(1 replies, posted in Guests & account requests)

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8

(5 replies, posted in Guests & account requests)

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9

(9 replies, posted in Guests & account requests)

I can add you, but you shouldn't hide behind Tor.

10

(9 replies, posted in Guests & account requests)

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13

(4 replies, posted in Guests & account requests)

Used the mail from the first post.

14

(4 replies, posted in Guests & account requests)

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16

(1 replies, posted in Guests & account requests)

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17

(5 replies, posted in Guests & account requests)

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18

(4 replies, posted in Guests & account requests)

Mail updated.

19

(4 replies, posted in Guests & account requests)

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20

(2 replies, posted in Guests & account requests)

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23

(1 replies, posted in Guests & account requests)

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25

(2 replies, posted in Guests & account requests)

(just in case you decide to send verifications or maybe new dumps)