From mboxrd@z Thu Jan  1 00:00:00 1970
From: Douglas Gilbert <dgilbert@interlog.com>
Subject: Re: [PATCH 2/2] sd: WRITE SAME(16) / UNMAP support
Date: Fri, 30 Oct 2009 00:28:38 -0400
Message-ID: <4AEA6B76.2010303@interlog.com>
References: <1256873409-12668-1-git-send-email-martin.petersen@oracle.com> <1256873409-12668-3-git-send-email-martin.petersen@oracle.com>
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To: "Martin K. Petersen" <martin.petersen@oracle.com>
Cc: hch@infradead.org, axboe@kernel.dk, matthew@wil.cx, linux-scsi@vger.kernel.org

Martin K. Petersen wrote:
> Implement a prepare discard function that sends either WRITE SAME(16) or
> UNMAP(10) depending on parameters indicated by the device in the block
> limits VPD.

And if both are supported by the logical unit, the patch
prefers UNMAP?

Doug Gilbert