[PATCH v2 3/3] [SCSI] Make LBP quirk skip lbpme checks tests

[James Bottomley]

On Mon, 2014-07-28 at 19:05 +0000, KY Srinivasan wrote:
> 
> > -----Original Message-----
> > From: Martin K. Petersen [mailto:martin.petersen at oracle.com]
> > Sent: Monday, July 28, 2014 12:03 PM
> > To: KY Srinivasan
> > Cc: Martin K. Petersen; Sitsofe Wheeler; Christoph Hellwig;
> > gregkh at linuxfoundation.org; linux-kernel at vger.kernel.org;
> > devel at linuxdriverproject.org; ohering at suse.com; apw at canonical.com;
> > jasowang at redhat.com; jbottomley at parallels.com; linux-
> > scsi at vger.kernel.org
> > Subject: Re: [PATCH v2 3/3] [SCSI] Make LBP quirk skip lbpme checks tests
> > 
> > >>>>> "KY" == KY Srinivasan <kys at microsoft.com> writes:
> > 
> > KY,
> > 
> > KY> "At the time thin-provisioning was defined, the discovery
> > KY> information was first proposed in READ CAPACITY 16 command. And
> > then
> > KY> moved into the new dedicated VPD page - B2h. You can see the
> > KY> information reported in this VPD page is richer than READ CAPACITY
> > KY> 16 command. As this transition happened during we added the feature,
> > KY> Windows uses the newer method that based on VPD page B2h. It looks
> > KY> Linux tries to use both new and old method which is weird to me."
> > 
> > The READ CAPACITY(16) response is not optional.
> 
> Ok; that settles the issue then. I will attempt to get it fixed on Windows.

Like Martin says, this isn't optional either/or; it's mandatory to
support the RC 16 bits.  If you don't want to get into playing the
messenger between us and the windows guys on SCSI standards, we'd be
happy to communicate directly, either by email or a phone meeting.

James