Michael Adam obnox at
Thu Oct 9 15:58:39 MDT 2014

On 2014-10-09 at 14:45 -0700, Richard Sharpe wrote:
> On Wed, Oct 8, 2014 at 7:29 AM, Richard Sharpe
> <realrichardsharpe at> wrote:
> > Hi folks,
> >
> > There are indications that HyperV requires the server to implement
> > FSCTL_LMR_REQUEST_RESILIENCY, so I have a proposed implementation of
> > it.
> >
> > Attached is a patch for both FSCTL_LMR_REQUEST_RESILIENCY and a small
> > torture test for it (doesn't do much as yet.)
> >
> > Eventually, we will also have to deal with the GUID-tagged blob that
> > is an Extra Info (Extra Create Parameter) that was in the CREATE
> > request that precedes the FSCTL as well, I imagine.
> While we are arguing about all the abstruse technical details, the
> people I did this work for have reported that this change, along with
> one other thing, seems to be enough to have HyperV create a Virtual
> Disk on a Samba server, start the VM and install Windows.
> I hope to be able to write up the steps involved soon.

That is great to hear!

But these details are not so abstruse at all I'd say,
but essential to our implementation of these features.
After all, if we offer the possiblity to run vm images
off a samba server, we have to make it vaguely safe I think.

Cheers - Michael
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