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Date:      Wed, 06 Apr 2022 18:53:41 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 263029] [mkimg] qcow2 images are not compressed by default
Message-ID:  <bug-263029-227-pQbm5lwD4c@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-263029-227@https.bugs.freebsd.org/bugzilla/>
References:  <bug-263029-227@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D263029

Ed Maste <emaste@freebsd.org> changed:

           What    |Removed                     |Added
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                 CC|                            |emaste@freebsd.org

--- Comment #2 from Ed Maste <emaste@freebsd.org> ---
Can you check the # of blocks occupied by the mkimg and qemu-img files (e.g.
stat -f%b)? Or paste a hexdump -Cv of the first few hundred bytes of each f=
ile
here.

AFAICT only qcow v3 actually supports compression; I wonder if the qemu-img
file is in fact a "sparse" image managed by qemu rather than the filesystem.

ref: https://git.qemu.org/?p=3Dqemu.git;a=3Dblob;f=3Ddocs/interop/qcow2.txt

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