From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Mon, 29 Jan 2001 07:55:15 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Mon, 29 Jan 2001 07:55:05 -0500 Received: from kullstam.ne.mediaone.net ([66.30.138.210]:13208 "HELO kullstam.ne.mediaone.net") by vger.kernel.org with SMTP id ; Mon, 29 Jan 2001 07:54:57 -0500 From: "Johan Kullstam" To: linux-kernel@vger.kernel.org Subject: Re: Poor SCSI drive performance on SMP machine, 2.2.16 In-Reply-To: <001601c089b0$b1ec80d0$b001a8c0@caesar> Organization: none Date: 29 Jan 2001 07:58:13 -0500 In-Reply-To: <001601c089b0$b1ec80d0$b001a8c0@caesar> Message-ID: User-Agent: Gnus/5.0808 (Gnus v5.8.8) Emacs/20.7 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org "paradox3" writes: > Here is the output from dmesg. How do I tell if it is improperly > terminated? you never gave the model of the hard drive (or if you did, i didn't see it), but you did say a 10k rpm ibm. i am going to assume it is u2w/lvd capable. no lvd hard drive has termination built in. you must use a seperate termination device at the end of the ribbon. or you can use a terminating cable. since your controller is a single-ended device, get a single-ended, wide, active terminator and plug it into the end of the ribbon. put the hard drive in the middle somewhere. see for more information. > Thanks, Para-dox (paradox3@maine.rr.com) > > > > > ----- Original Message ----- > From: "Michael Brown" > To: > Sent: Sunday, January 28, 2001 11:12 PM > Subject: Re: Poor SCSI drive performance on SMP machine, 2.2.16 > > > > Your problem appears to be improper SCSI termination. > > > > You need to either > > 1) make sure your SCSI drive has termination enabled > > or > > 2) move your SCSI drive to the middle connector and put a terminator on > > the last connector > > > > Check your syslog and post to l-k the part where it detects your drives. > > I'll bet the adapter is throttling back quite dramatically in the presence > > of improper termination. > > > > -- > > Michael Brown > > > > _________________________________________________________________ > > Get your FREE download of MSN Explorer at http://explorer.msn.com > > > > > -- J o h a n K u l l s t a m [kullstam@ne.mediaone.net] Don't Fear the Penguin! - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/