From owner-freebsd-hardware@FreeBSD.ORG Fri Jun 25 22:29:44 2004 Return-Path: Delivered-To: freebsd-hardware@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 6299416A4CE for ; Fri, 25 Jun 2004 22:29:44 +0000 (GMT) Received: from cube.gelatinous.com (rdns.106.161.62.64.fre.communitycolo.net [64.62.161.106]) by mx1.FreeBSD.org (Postfix) with ESMTP id 2B2F043D2F for ; Fri, 25 Jun 2004 22:29:44 +0000 (GMT) (envelope-from scott@gelatinous.com) Received: (qmail 72021 invoked from network); 25 Jun 2004 22:29:18 -0000 Received: from unknown (HELO ?10.5.5.22?) (65.249.13.121) SMTP; 25 Jun 2004 22:29:18 -0000 From: "Scott T. Smith" To: freebsd-hardware@freebsd.org Content-Type: text/plain Message-Id: <1088202519.8211.17.camel@tinny.home.foo> Mime-Version: 1.0 X-Mailer: Ximian Evolution 1.4.6 Date: Fri, 25 Jun 2004 15:28:39 -0700 Content-Transfer-Encoding: 7bit Subject: 3ware 8506 JBOD problem X-BeenThere: freebsd-hardware@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: General discussion of FreeBSD hardware List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 25 Jun 2004 22:29:44 -0000 I'm running FreeBSD 5.2.1-RELEASE on a machine with three 3ware 8506-8 cards, each with 8 disks attached in JBOD mode. I'm having problems making hotswapping work properly, and I'm wondering if anyone else has seen the same thing, and if it's a controller or OS problem. If I issue consecutive reads from two disks on the same controller, and yank a disk, then the process reading from that disk hangs (obviously) while the other keeps going. However, about 20 seconds later, the other process hangs for a bit too. Then if I issue the 'maint remove c2 u0' command, the other disk will hang again. This seems like odd behaviour for a RAID card. Is it just that you cannot remove a disk without telling the controller first? Or does JBOD mode behave less effectively than RAID mode? Scott