From mboxrd@z Thu Jan 1 00:00:00 1970 From: James Bottomley Subject: Re: Mount by WWN (FC, using qlogic 2200) Date: 04 Feb 2004 18:23:14 -0500 Sender: linux-scsi-owner@vger.kernel.org Message-ID: <1075936996.2029.131.camel@mulgrave> References: Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit Return-path: Received: from stat1.steeleye.com ([65.114.3.130]:19594 "EHLO hancock.sc.steeleye.com") by vger.kernel.org with ESMTP id S264887AbUBDXXV (ORCPT ); Wed, 4 Feb 2004 18:23:21 -0500 In-Reply-To: List-Id: linux-scsi@vger.kernel.org To: Bryan Henderson Cc: EXT / DEVOTEAM VAROQUI Christophe , "'linux-scsi@vger.kernel.org'" , Martin Peschke3 , "Robert J. Adams (jason)" On Wed, 2004-02-04 at 18:12, Bryan Henderson wrote: > But it doesn't identify the "device" as Linux defines a device. Setting > aside multiple paths for the moment, a Linux sd device corresponds to an > FCP logical unit, and the WWN identifies an FCP target (aka physical unit). > I.e. where a physical unit has multiple logical units, multiple linux sd > devices can have the same WWN. Actually, the SPC-3 (rev 16) section 7.6.4.1 does say the Device Identification VPD Page ... [shall apply] to the logical unit. Of course, not all devices obey this, as you say, but still. James