On Sat, Sep 11, 2010 at 3:04 PM, Anthony Liguori <aligu...@us.ibm.com> wrote: > Additionally, there's a spurious read when using an nbd protocol that can be > quite destructive when using copy-on-read. Potentially, this can lead to > probing an image file over top of NBD but this is completely wrong as NBD > devices are not growable.
Can you describe the copy-on-read scenario where the 2 KB probe read is a problem? Accessing a fixed size image file over NBD is probably uncommon, but I'm not sure if there's a reason to forbid it. Stefan
