How to restoe original state of Windows ISO (CRC32)?

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Raiker
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How to restoe original state of Windows ISO (CRC32)?

Post by Raiker »

Original Windows ISOs contain "autocrc". After ISO is burned, and you rip it again (let's say with UltraISO) you get an ISO with CRC32 FFFFFFFF. I'm interesting, how to get such ripped ISO in original state?

Thanks
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RentedMule
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Post by RentedMule »

Well, that is the point of CRC... if the CRC entry doesn't match the calculated CRC of that data sector, then it can't be read.... not appropriately anyway.

Raiker
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Post by Raiker »

Have you understood the question correctly? AutoCRC is a feature, that adds to ISO such quality that when it's ripped it returns CRC FFFFFFFF. Such ISO works properly, and I ask, how to return original CRC to such image?
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RentedMule
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Post by RentedMule »

Build a new image. Fire up UltraISO or something similar, drag the files of the image to your new image project and build it. If it is a bootable CD, you will need to grab the boot header from the original ISO as well and add it to your new project.

TheWahbinator
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Post by TheWahbinator »

NEVER EVER REPACK. Repacking is exactly how betas into mush.

What you should do is mount the ISO with Daemon Tools, then create an ISO directly from the disc. For example, if you have UltraISO, mount the disc then right click the emulated CD-ROM drive, point to UltraISO, and click Create CD/DVD Image. The new image created will have a correct AutoCRC.
I've done this countless times as the people who store stuff on their FTPs neglect to verify their files.

Note that any ISO created with the -x command with CDIMAGE still has a plain old CRC-32 of 0xFFFFFFFF

Raiker
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Post by Raiker »

TheWahbinator wrote:NEVER EVER REPACK. Repacking is exactly how betas into mush.

What you should do is mount the ISO with Daemon Tools, then create an ISO directly from the disc. For example, if you have UltraISO, mount the disc then right click the emulated CD-ROM drive, point to UltraISO, and click Create CD/DVD Image. The new image created will have a correct AutoCRC.
I've done this countless times as the people who store stuff on their FTPs neglect to verify their files.
Thanks!
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