From owner-freebsd-hardware@FreeBSD.ORG Fri Jul 26 22:16:43 2013 Return-Path: Delivered-To: freebsd-hardware@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTP id C665FC8C for ; Fri, 26 Jul 2013 22:16:43 +0000 (UTC) (envelope-from Bob.Bawn@nirvanix.com) Received: from db9outboundpool.messaging.microsoft.com (mail-db9lp0250.outbound.messaging.microsoft.com [213.199.154.250]) (using TLSv1 with cipher AES128-SHA (128/128 bits)) (No client certificate requested) by mx1.freebsd.org (Postfix) with ESMTPS id 5CD9823AD for ; Fri, 26 Jul 2013 22:16:42 +0000 (UTC) Received: from mail110-db9-R.bigfish.com (10.174.16.225) by DB9EHSOBE021.bigfish.com (10.174.14.84) with Microsoft SMTP Server id 14.1.225.22; Fri, 26 Jul 2013 22:01:26 +0000 Received: from mail110-db9 (localhost [127.0.0.1]) by mail110-db9-R.bigfish.com (Postfix) with ESMTP id 8E08280137 for ; Fri, 26 Jul 2013 22:01:26 +0000 (UTC) X-Forefront-Antispam-Report: CIP:208.84.97.55; KIP:(null); UIP:(null); IPV:NLI; H:CORPEX001.nirvanix.com; RD:mail.nirvanix.com; EFVD:NLI X-SpamScore: -2 X-BigFish: VPS-2(zz98dIfecIzz1f42h208ch1ee6h1de0h1fdah2073h1202h1e76h1d1ah1d2ah1fc6hzz1de098h8275bh1de097hz2dh2a8h668h839h944hd25hf0ah1220h1288h12a5h12a9h12bdh137ah13b6h1441h14ddh1504h1537h153bh15d0h162dh1631h1758h18e1h1946h19b5h1b0ah1d0ch1d2eh1d3fh1dfeh1dffh1e1dh1155h) Received: from mail110-db9 (localhost.localdomain [127.0.0.1]) by mail110-db9 (MessageSwitch) id 1374876085110720_24846; Fri, 26 Jul 2013 22:01:25 +0000 (UTC) Received: from DB9EHSMHS006.bigfish.com (unknown [10.174.16.249]) by mail110-db9.bigfish.com (Postfix) with ESMTP id 0A0B72E0049 for ; Fri, 26 Jul 2013 22:01:25 +0000 (UTC) Received: from CORPEX001.nirvanix.com (208.84.97.55) by DB9EHSMHS006.bigfish.com (10.174.14.16) with Microsoft SMTP Server (TLS) id 14.16.227.3; Fri, 26 Jul 2013 22:01:24 +0000 Received: from CORPEX001.nirvanix.com ([::1]) by CORPEX001.nirvanix.com ([::1]) with mapi id 14.01.0355.002; Fri, 26 Jul 2013 15:01:22 -0700 From: Bob Bawn To: "freebsd-hardware@freebsd.org" Subject: Re: Reset Problem with SATA Port Multiplier Thread-Topic: Reset Problem with SATA Port Multiplier Thread-Index: AQHOikupn7cNLZX6kUmNhLgF8q/2JQ== Date: Fri, 26 Jul 2013 22:01:21 +0000 Message-ID: <94969AC586B81A4BBD2484F9862736A80CDAE9A2@CORPEX001.nirvanix.com> References: In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.0.8.13] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: nirvanix.com X-FOPE-CONNECTOR: Id%0$Dn%*$RO%0$TLS%0$FQDN%$TlsDn% X-BeenThere: freebsd-hardware@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: General discussion of FreeBSD hardware List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 26 Jul 2013 22:16:43 -0000 On Thu, Jul 25, 2013, Dieter BSD wrote: > Sounds like FreeBSD is doing something bad to the pm, which Linux isn't > doing. Perhaps log the commands the OS sends to the controller (over the > network to a 2nd machine, or to a local disk not on a pm) and compare > BSD to Linux? Perhaps start logging when you get the first timeout, to > save hours of commands to wade through. Yes, that occurred to me. I was hoping to avoid learning how to build kernels with debug messages but I suppose it's a good skill to have. :-) > Alternately you could stare at the driver sources until enlightenment > occurs. I did a little of this and superficially it does seem like there could be differences between FreeBSD and Linux in the treatment of the mysterious 6th port (SEMB) on the 5-port multiplier. Hopefully, the logging you suggest will clarify the situation. Thanks for your help.