Re: [Qemu-devel] DMG chunk size independence

[John Snow <jsnow@redhat.com>]

On 04/23/2017 05:03 AM, Ashijeet Acharya wrote:
> Hi,
> 
> Great news!
> I have almost completed this task and the results are looking
> promising. I have not yet attended to the DMG files having bz2
> compressed chunks but that should be easy and pretty similar to my
> approach for zlib compressed files. So, no worries there.
> 
> For testing I am first converting the images to raw format and then
> comparing the resulting image with the one converted using v2.9.0 DMG
> driver and after battling for 2 days with my code, it finally prints
> "Images are identical." According to John, that should be pretty
> conclusive and I completely agree.
> 

Yes, comparing a sample.dmg against a raw file generated from the 2.9.0
qemu-img tool should be reasonably good evidence that you have not
altered the behavior of the tool.

> Now, the real thing I wanted to ask was, if someone is aware of a DMG
> file which has a chunk size above 64 MiB so that I can test those too.
> If yes, please share the download link with me.
> Currently I am testing the ones posted by Peter Wu while submitting
> his DMG work in 2014.
> Here -> https://lists.nongnu.org/archive/html/qemu-devel/2014-12/msg03606.html
> 

Are any of those over 64MB? I assume you're implying that they aren't.

Maybe Peter knows?...

> Expect v1 soon...
> 
> Ashijeet
>