From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mike Anderson Subject: Re: Does dm handle tape devices? Date: Fri, 2 Nov 2007 14:20:48 -0700 Message-ID: <20071102212048.GA4711@linux.vnet.ibm.com> References: <20071102195126.GA3712@linux.vnet.ibm.com> Reply-To: device-mapper development Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline 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: device-mapper development List-Id: dm-devel.ids lemons_terry@emc.com wrote: > A third application, alas, uses SCSI IDs to refer to the tape devices. > I've been instructed to seek a persistent naming solution for this > application, too, one that (hopefully) won't require modification of the > application. I started out looking at the QLogic FC HBA's persistence > capability, and saw that it functions at the target level within a > single HBA. But I found that some vendors don't support this method of > persistence, opting instead to use device mapper. > If the "third application" is wanting a I:T:L nexus for some type of passthrough SG_IO operation I assume someone must provide the device nodes to the application to open for its operations (config file??). Since this is not device mapper specific maybe send me a reply offlist and maybe I can help guide your request back to the proper list for more discussion. -andmike -- Michael Anderson andmike@linux.vnet.ibm.com