1 Reply by Ris

(1 replies, posted in General discussion)

1. It shouldn't really matter what speed you read the disc at, most drives
will slow down the read speed if errors occurs due to a scratched disc.

2. ISOBuster seems to extract the RAW data tracks with an ISO extension not a BIN extension.
As long as you choose the '2352 bytes/sector / RAW option' (Can't remember the exact option name
its the same option as the one used in the guide) you can just rename the extension from ISO to BIN.

You can also download and use the MD5 (or SFV) on the details page of each game and use them to
check the hashes of your files, If they match then you can be 100% sure your dump is good.
(I use 'Quickpar' to check the MD5 of my files, but there are other programs that can do it as well)

3. No, that should not cause any damage to the disc at all.

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2 Reply by Ris

(75 replies, posted in General discussion)

Some PSP scene releases are missing 2048 (or sometimes 6144) bytes from the end of the ISO
The built-in UMD Dumper on M33 firmwares misses the last few sectors resulting in a bad dump.

PSP Filer can correctly dump UMD and doesn't miss the last few sectors.

Usually the missing data is all 00's, so sometimes you can just add 2048 or 6144 bytes
of 00's onto the end of the scene release iso and it will match the redump iso.

The DAT on no-intro is actually using data from the Scene Releases.
Scene releases are not verified to be good dumps, this is what redump is doing.

From your example above of 'Knights in the Nightmare (USA)':
(your Dump) 509116416 minus (Scene) 509114368 = 2,048 bytes (scene release is underdumped 2048 bytes)

If you add 2048 bytes of 00's onto the end of the scene ISO, you will probably get the same CRC as your dump.
(But you can't do this for all games though, as some games do have data in the last few sectors.)
It looks like the scene release of 'Knights in the Nightmare (USA)' was dumped using the built-in M33 dumper (bad dump).
(The built-in dumper is the one where can change USB device to UMD0 in the VSH menu on 5.00M33 etc)

'Knights in the Nightmare (USA)' is not in the redump.org database, so post it in the new dumps section of the forum.
Your 'Loco Roco 2 (USA)' dump matches the one on the redump.org database, so it looks like you are dumping correctly.


edit: reworded post a little...

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