linux-kernel - RE: [PATCH] scsi:storvsc enable reading from VPD pages on SPC-2

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Date:	Wed, 10 Dec 2014 22:28:07 +0000
From:	Long Li <longli@...rosoft.com>
To:	"Martin K. Petersen" <martin.petersen@...cle.com>
CC:	KY Srinivasan <kys@...rosoft.com>,
	Haiyang Zhang <haiyangz@...rosoft.com>,
	"JBottomley@...allels.com" <JBottomley@...allels.com>,
	"linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>,
	"devel@...uxdriverproject.org" <devel@...uxdriverproject.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH] scsi:storvsc enable reading from VPD pages on SPC-2

> >>>>> "Long" == Long Li <longli@...rosoft.com> writes:
> 
> Long> MSFT targets currently claim SPC-2 compliance while they implement
> Long> post SPC-2 features. With this patch we can correctly handle
> Long> WRITE_SAME_16 issues.
> 
> Handle the issues or handle WRITE SAME(10/16)?

With this patch, the SCSI layer will be able to correctly send WRITE_SAME_16 to the Hyper-V host. It will not send WRITE_SAME_10: it has been disabled in the driver template. Do you want me to send another patch with these details?

> 
> +	{"Msft", "Virtual Disk", "1.0", BLIST_TRY_VPD_PAGES},
> 
> Is that version field meaningful or is it safe for us to inquire about VPD pages
> without problems on older versions?

This version is used in all current Hyper-V hosts: Windows 2008 R2, 2012 and 2012 R2. However it may change in future Windows releases.

> 
> --
> Martin K. Petersen	Oracle Linux Engineering
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