From mboxrd@z Thu Jan 1 00:00:00 1970 From: djshetty Subject: Some doubts in Persistent Reservation Date: Thu, 23 Nov 2006 23:55:16 -0800 (PST) Message-ID: <7519006.post@talk.nabble.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Return-path: Received: from www.nabble.com ([72.21.53.35]:36063 "EHLO talk.nabble.com") by vger.kernel.org with ESMTP id S1757641AbWKXHzQ (ORCPT ); Fri, 24 Nov 2006 02:55:16 -0500 Received: from [72.21.53.38] (helo=jubjub.nabble.com) by talk.nabble.com with esmtp (Exim 4.50) id 1GnVu0-0000U0-7o for linux-scsi@vger.kernel.org; Thu, 23 Nov 2006 23:55:16 -0800 Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: linux-scsi@vger.kernel.org Hi, I have been trying to understand PERSISTENT RESERVATION as per SCSI SPC-3 standards. I had the following two doubts: 1. Is persistent reservation applied on a target port or on a particular LUN connected to a target port. The SCOPE of persistent reservation says "Entire LOGICAL UNIT", whereas the registration is done for a target PORT. Hence the confusion. 2. Is there any precise use of the PRGeneration key? I guessed it must be used for knowing whether any changes have been on the target (with regards to persistent reservation) since the previous command executed. Regards, Dhiraj. -- View this message in context: http://www.nabble.com/Some-doubts-in-Persistent-Reservation-tf2696285.html#a7519006 Sent from the linux-scsi mailing list archive at Nabble.com.