Re: [Qemu-devel] [PATCH] Warn if a qcow (not qcow2) file is opened

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Kevin Wolf wrote:
Avi Kivity schrieb:
The qcow block driver format is no longer maintained and likely contains
serious data corruptors.  Urge users to stay away for it, and advertise
the new and improved replacement.

Signed-off-by: Avi Kivity <avi@xxxxxxxxxx>

vvfat is using qcow internally, so the warning will appear there, too.
Not that warning against vvfat would be a bad thing, but this error
message could be confusing.

Maybe we're lucky enough and vvfat survives a s/qcow/qcow2/, but I
really never wanted to touch that code...

I'm not sure how I feel about this. Can we prove qcow is broken? Is it only broken for writes and not reads?

If we're printing a warning, does that mean we want to deprecate qcow and eventually remove it (or remove write support, at least)?

Regards,

Anthony Liguori

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