Re: [PATCH 0/3] scsi: Add Hyper-V logical block provisioning quirks

From: Christoph Hellwig
Date: Sat Oct 11 2014 - 13:39:13 EST

On Fri, Oct 10, 2014 at 08:49:01AM +0100, Sitsofe Wheeler wrote:
> Microsoft Hyper-V virtual disks currently only claim SPC-2 compliance
> even though they implement post SPC-2 features (such as thin
> provisioning) which means the Linux kernel does not go on to test for
> those features even though they are advertised.
> A previous patch attempted to add a quirk to workaround this but the
> quirk was only enabled after the features had been scanned for, wouldn't
> work for "small" disks and would quirk on all Hyper-V SCSI devices
> (e.g. passthrough disks).
> The new patches partially revert the previous effort, add the quirk in a
> more traditional manner to only Hyper-V virtual disks and work on small
> virtual disks.

This seems like might want a quirk to simply "force" a SPC3 compliance
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