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Re: Bug#531079: RFS: ecm -- prepares CD image files so they compress better



Joachim Reichel wrote:
Loic: I'm happy to sponsor this upload if you can get the data loss bug
fixed. There might be some small changes to the packaging needed, but
I'm confident that these can be easily sorted out.

I haven't been able to reproduce this bug once. I tried with raw images smaller than 2GB (1.9GB), between 2 and 4GB, and over 4GB. On raw images smaller than 2GB, everything work fine. On images bigger than 2GB, ecm aborts cleanly with the following error message:

  Encoding foo.iso to foo.iso.ecm.
  foo.iso: Value too large for defined data type

It doesn't even start creating the .ecm file. Also, in the event you had a crash and the .ecm file didn't finish (it can take a while), the original .iso is never modified - the .ecm file is created as a separate file, so I also don't know where the original data was lost.

I've been using ecm on i386 and amd64 without any data loss for a few years now. Although the program should also work on other arch, are you using something different?

Loïc


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