From mboxrd@z Thu Jan 1 00:00:00 1970 From: Bart Van Assche Subject: Re: API for multi-segment atomic IO Date: Wed, 8 Jul 2015 08:38:31 -0700 Message-ID: <559D43F7.9010506@sandisk.com> References: Reply-To: device-mapper development Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; Format="flowed" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dm-devel-bounces@redhat.com Errors-To: dm-devel-bounces@redhat.com To: doug@easyco.com, device-mapper development List-Id: dm-devel.ids On 07/07/2015 08:33 PM, Doug Dumitru wrote: > ... is anyone working on such an animal. I was thinking of a "struct > bio" extension. I know that Fusion had a private API for this, but I am > not a Fusion customer so I have not seen their concepts. The following document may be helpful: "SBC-4 SPC-5 Atomic writes and reads" (http://www.t10.org/cgi-bin/ac.pl?t=d&f=13-064r9.pdf). Please note that the information about atomic writes in that document has been superseded by the section in the SBC-4 document about atomic writes (http://www.t10.org/cgi-bin/ac.pl?t=f&f=sbc4r07c.pdf). Bart.