From mboxrd@z Thu Jan 1 00:00:00 1970 From: Chandra Seetharaman Subject: Re: Device-mapper-multipath RDAC Date: Mon, 24 Sep 2007 11:33:32 -0700 Message-ID: <1190658812.1933.141.camel@linuxchandra> References: <200709241706.26322.npf-mlists@eurotux.com> Reply-To: sekharan@us.ibm.com, device-mapper development Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <200709241706.26322.npf-mlists@eurotux.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dm-devel-bounces@redhat.com Errors-To: dm-devel-bounces@redhat.com To: device-mapper development List-Id: dm-devel.ids On Mon, 2007-09-24 at 17:06 +0100, Nuno Fernandes wrote: > hello, > > Just a question: > > With recent support for rdac hardware handler in kernel 2.6.23-rc7, what > configuration should be in storage DS4700? AVT (Automatic Volume transfer) > turned on or off? Hardware handler is needed only for RDAC mode, AVT would work without the hardware handler. The decision to use RDAC or AVT depends on your configuration. > > When it's turned on, luns keep on jumping from controller to controller.. dm-multipath will use the other path (in AVT mode, IOW, jump) only if I/O in the current path fails. > > Thanks > Nuno Fernandes > > -- > dm-devel mailing list > dm-devel@redhat.com > https://www.redhat.com/mailman/listinfo/dm-devel -- ---------------------------------------------------------------------- Chandra Seetharaman | Be careful what you choose.... - sekharan@us.ibm.com | .......you may get it. ----------------------------------------------------------------------