From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S265141AbUHCSrM (ORCPT ); Tue, 3 Aug 2004 14:47:12 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S266797AbUHCSrM (ORCPT ); Tue, 3 Aug 2004 14:47:12 -0400 Received: from watson.wustl.edu ([128.252.233.1]:46511 "EHLO watson.wustl.edu") by vger.kernel.org with ESMTP id S265141AbUHCSrH (ORCPT ); Tue, 3 Aug 2004 14:47:07 -0400 Message-ID: <54073.10.0.1.211.1091558826.squirrel@10.0.1.211> In-Reply-To: <1091554289.3898.5.camel@localhost.localdomain> References: <4107E4B3.6070904@watson.wustl.edu> <20040803180821.GB6265@logos.cnet> <1091554289.3898.5.camel@localhost.localdomain> Date: Tue, 3 Aug 2004 13:47:06 -0500 (CDT) Subject: Re: dma problems with Serverworks CSB5 chipset From: "Rich Wohlstadter" To: "Alan Cox" Cc: "Marcelo Tosatti" , "Linux Kernel Mailing List" , "Bartlomiej Zolnierkiewicz" Reply-To: rwohlsta@watson.wustl.edu User-Agent: SquirrelMail/1.4.3a X-Mailer: SquirrelMail/1.4.3a MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT X-Priority: 3 (Normal) Importance: Normal X-AntiVirus: checked by Vexira MailArmor (version: 2.0.1.6; VAE: 6.26.0.10; VDF: 6.26.0.57; host: watson.wustl.edu) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org > On Maw, 2004-08-03 at 19:08, Marcelo Tosatti wrote: >> ServerWorks OSB4/5 chipsets are known to not work reliably with the >> Linux >> IDE code. AFAIK its a hardware problem which we dont correctly work >> around. >> >> Have you tried disabling DMA? >> >> Bart and Alan are IDE experts, they can probably give you more useful >> information. > > CSB5 is reliable, rock solidly so in my experience. OSB4 was the older > interface with problems. Are these systems SMP, what disks are you using > and in what IDE mode ? > Yep, they are SMP(IBM blades with 2 Xeon 2.4Ghz). The blades use 1 little 40g laptop drive( TOSHIBA MK4019GAXB ). The drive is running UDMA mode 4. Here is the output of /proc/ide/svwks: ServerWorks OSB4/CSB5/CSB6 ServerWorks CSB5 Chipset (rev 93) ------------------------------- General Status --------------------------------- --------------- Primary Channel ---------------- Secondary Channel ------------- enabled enabled --------------- drive0 --------- drive1 -------- drive0 ---------- drive1 ------ DMA enabled: yes yes no no UDMA enabled: yes yes no no UDMA enabled: 4 4 0 0 DMA enabled: 2 2 2 2 PIO enabled: 4 4 ? ? Let me know if you need any other specifics and thanks in advance for any advice. Rich