From owner-freebsd-fs@FreeBSD.ORG Mon Jun 27 13:18:42 2005 Return-Path: X-Original-To: fs@freebsd.org Delivered-To: freebsd-fs@FreeBSD.ORG Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 2574F16A41C for ; Mon, 27 Jun 2005 13:18:42 +0000 (GMT) (envelope-from anderson@centtech.com) Received: from mh2.centtech.com (moat3.centtech.com [207.200.51.50]) by mx1.FreeBSD.org (Postfix) with ESMTP id CF7AC43D49 for ; Mon, 27 Jun 2005 13:18:40 +0000 (GMT) (envelope-from anderson@centtech.com) Received: from [10.177.171.220] (neutrino.centtech.com [10.177.171.220]) by mh2.centtech.com (8.13.1/8.13.1) with ESMTP id j5RDIWXC024850; Mon, 27 Jun 2005 08:18:32 -0500 (CDT) (envelope-from anderson@centtech.com) Message-ID: <42BFFCA2.1060206@centtech.com> Date: Mon, 27 Jun 2005 08:18:26 -0500 From: Eric Anderson User-Agent: Mozilla/5.0 (X11; U; FreeBSD i386; en-US; rv:1.7.8) Gecko/20050603 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Skylar Thompson References: <20050626182031.GA5268@quark.cs.earlham.edu> In-Reply-To: <20050626182031.GA5268@quark.cs.earlham.edu> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Cc: fs@freebsd.org Subject: Re: Snapshot problems X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 27 Jun 2005 13:18:42 -0000 Skylar Thompson wrote: > I've discovered a repeatable problem with FreeBSD's UFS2 snapshots. If I > create several snapshots, and then do heavy disk I/O on the original > filesystem (deletions, creations, simple touches, etc.) I can cause the I/O > system to crash. There is no kernel panic, and the machine still answers > pings, but no disk I/O occurs. I can replicate this on a dual-processor > beige-box system with a Mylex RAID controller and a RAID-5 set, and also on > a dual-processor Dell Poweredge 2650 with a PERC 3/i RAID controller and a > RAID-5 set and RAID-1 set. FreeBSD 5.4-RELEASE is installed on both > systems, and SMP is enabled as well, with HTT disabled on the Poweredge. I > have DDB compiled in, so I can get debug information but I don't know what > to look for. If you are able to get into the debugger, can you get a backtrace? Also - you might want to send this to freebsd-stable@, try upgrading to -stable, or try installing 6-CURRENT and see if the problem exists there (if that's an option). Eric -- ------------------------------------------------------------------------ Eric Anderson Sr. Systems Administrator Centaur Technology A lost ounce of gold may be found, a lost moment of time never. ------------------------------------------------------------------------