On 04/16/2012 11:22 AM, Hendrik Boom wrote:
> Just what *is* qemu's raw disk image file format?
> 
> Is it just a byte-by-byte, block-by-block copy of the hard drive, such as 
> can be produced by executing
> 
> cp /dev/hda imagefile

Yep.  Doesn't get any more raw than that :)

> 
> ?  Or does it have more structure or headers or such?

No headers; in fact, the lack of headers is why auto-probing an
arbitrary disk file for its format is a security risk - if you hand qemu
a raw image, the guest can manipulate that image to look like any other
file type, so that probing would guess the wrong type.

-- 
Eric Blake   ebl...@redhat.com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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