From owner-freebsd-stable@FreeBSD.ORG Fri Jan 14 18:27:39 2005 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 215B616A4CE for ; Fri, 14 Jan 2005 18:27:39 +0000 (GMT) Received: from pooker.samsco.org (pooker.samsco.org [168.103.85.57]) by mx1.FreeBSD.org (Postfix) with ESMTP id A06D943D2F for ; Fri, 14 Jan 2005 18:27:38 +0000 (GMT) (envelope-from scottl@freebsd.org) Received: from [192.168.254.12] (g4.samsco.home [192.168.254.12]) (authenticated bits=0) by pooker.samsco.org (8.12.11/8.12.10) with ESMTP id j0EIVC4R006880; Fri, 14 Jan 2005 11:31:13 -0700 (MST) (envelope-from scottl@freebsd.org) Message-ID: <41E80F07.6000000@freebsd.org> Date: Fri, 14 Jan 2005 11:27:19 -0700 From: Scott Long User-Agent: Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US; rv:1.7) Gecko/20040514 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Tony Byrne References: <1433078378.20050111134014@byrnehq.com> <20050113172415.E13904@carver.gumbysoft.com> <279983263.20050114092121@byrnehq.com> In-Reply-To: <279983263.20050114092121@byrnehq.com> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Status: No, hits=0.0 required=3.8 tests=none autolearn=no version=2.63 X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on pooker.samsco.org cc: dermot@directski.com cc: freebsd-stable@freebsd.org Subject: Re: MegaRAID 'Bad Slot' Kernel message and crash. X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 14 Jan 2005 18:27:39 -0000 Tony Byrne wrote: > Hello Doug, > > Friday, January 14, 2005, 1:35:16 AM, you wrote: > > DW> scottl has been able to reproduce this on a U320 controller he has. I only > DW> have U160 equipment and can't get the txn rate up high enough to reproduce > DW> the issue. The driver needs KTR instrumentation so we can see where the > DW> bad slot is popping up from. The "bad slot" message appears when the > DW> controller returns completion for a command that had already completed. > > DW> The amr driver has several other issues and is in dire need of an > DW> overhaul. Unfortunately LSI has not been forthcoming with documentation, > DW> so Scott and I are pretty much scratching our heads without knowing where > DW> to go. > > DW> This is in 5.X and HEAD, at least. I can't comment on 4.x. > > We have switched off adaptive read caching on the card. One of my > other correspondents has said that he hasn't been experiencing this > problem. He sent me his configuration settings. Only time will tell > if this helps. > > What is state-of-the-art, regarding SCSI RAID support in FreeBSD? > Which cards / drivers are favoured for their stability? We are > building a second server, initially without RAID, but given our > problems with amr we are considering another RAID controller supported by a > different driver. We want to do write caching and need a card that > supports a battery backed cache. How about the Adaptec cards? > > Regards, > > Tony. > This question has been discussed at length on the freebsd-scsi mailing list under the topic 'Recommended RAID controller'. I can send you some recap emails if you need. Scott