From owner-freebsd-questions@FreeBSD.ORG Sun Oct 7 07:03:32 2012 Return-Path: Delivered-To: questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id EA4A3106564A for ; Sun, 7 Oct 2012 07:03:32 +0000 (UTC) (envelope-from jau@iki.fi) Received: from jau.iki.fi (ip193-64-26-117.cust.eunet.fi [193.64.26.117]) by mx1.freebsd.org (Postfix) with ESMTP id 4D58F8FC08 for ; Sun, 7 Oct 2012 07:03:30 +0000 (UTC) Received: from [192.168.1.131] (sleipnir.thunderbolt.fi [192.168.1.131]) by jau.iki.fi (8.14.5/8.14.5) with ESMTP id q9773MLc026892 for ; Sun, 7 Oct 2012 10:03:23 +0300 (EEST) (envelope-from jau@iki.fi) Message-ID: <50712935.20900@iki.fi> Date: Sun, 07 Oct 2012 10:03:17 +0300 From: "Jukka A. Ukkonen" User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:15.0) Gecko/20120912 Thunderbird/15.0.1 MIME-Version: 1.0 To: questions@freebsd.org Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.2.7 (jau.iki.fi [192.168.1.42]); Sun, 07 Oct 2012 10:03:23 +0300 (EEST) Cc: Subject: FreeBSD & SCSI LUN reservation (essentially an exclusive lock) X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 07 Oct 2012 07:03:33 -0000 Hello all, Is there any way for a process in user space to try to trigger a SCSI LUN reservation in FreeBSD? This would be a very useful thing to have when using a multi-port storage device which can be simultaneously connected to multiple systems. --jau