From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Y. D." Subject: Can we use blktrace to do snapshot of a block device? Date: Thu, 11 Dec 2008 17:26:10 +0800 Message-ID: <200812111726093187607@gmail.com> Reply-To: device-mapper development Mime-Version: 1.0 Content-Type: text/plain; charset="gb2312" Content-Transfer-Encoding: 7bit Return-path: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dm-devel-bounces@redhat.com Errors-To: dm-devel-bounces@redhat.com To: dm-devel List-Id: dm-devel.ids Hi All, I want to do a software mirroring of a block device. I find that blktrace is an excellent tool to begin with. However, I find blktrace only gets the parameters of the block device requests. Is it feasible to enhance blktrace as to do mirroring of a block device? Can anyone help with that? Thanks in advance, Shawn