From mboxrd@z Thu Jan 1 00:00:00 1970 From: Chandra Seetharaman Subject: Re: Sun StorageTek 2530 and dm? Date: Mon, 24 Aug 2009 13:24:57 -0700 Message-ID: <1251145497.24406.18.camel@chandra-ubuntu> References: <20090823210536.4730636d@nb-jsosic> <20090823213448.154d6cff@nb-jsosic> <20090824202915.27815959@pc-jsosic.srce.hr> <1251139716.24406.4.camel@chandra-ubuntu> <20090824205933.4b4c8456@pc-jsosic.srce.hr> Reply-To: sekharan@linux.vnet.ibm.com, device-mapper development Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20090824205933.4b4c8456@pc-jsosic.srce.hr> 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 Have you verified there is no physical issues with the path ? On Mon, 2009-08-24 at 20:59 +0200, Jakov Sosic wrote: > On Mon, 24 Aug 2009 11:48:36 -0700 > Chandra Seetharaman wrote: > > > This is the expected behavior, when IOs on the active path fails, the > > hardware handler will activate the passive path and make it active and > > start sending IOs thru that newly activated path. > > > > Send MODE_SELECT is how the hardware handler makes the passive path > > active. > > Yes, I am aware of the multipathing and switching in case of failure - > but what is bugging me is why is it happening so often? Or can I be > more precise - why is it happening CONSTANTLY? > > >