From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mogens Valentin Subject: Re: SCSI vs SATA considerations Date: Sat, 08 May 2004 20:52:06 +0200 Sender: linux-scsi-owner@vger.kernel.org Message-ID: <409D2C56.7B7BEE7E@danbbs.dk> References: <200405071455.i47EtBB18653@www.watkins-home.com> Reply-To: monz@danbbs.dk Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Return-path: Received: from pfepc.post.tele.dk ([195.41.46.237]:2588 "EHLO pfepc.post.tele.dk") by vger.kernel.org with ESMTP id S264072AbUEHStd (ORCPT ); Sat, 8 May 2004 14:49:33 -0400 List-Id: linux-scsi@vger.kernel.org To: Guy Cc: Linux-scsi Guy wrote: > > Check the jumpers on the disk. Most have a force SE jumper, that would > limit you to 40M/s. > Also, anything else on the SCSI bus? If so, if 1 device is SE the bus > must be SE, which would limit you to 40M/s. No other devices on the scsi bus. The SE jumper is not installed. Tried with/without - once had an older IBM scsi disk where the docs had the definition on one pin reverted :- I had it jumpered as ID2; making it ID0, for some reason it properly negotiates as a 160 device, at 80MHz, of cause. I still get only 34.4 MB/s, though (misspelled the speed in first post). Tried forcing 80MB/s, disabling domain validation, and forcing termination on the 29160, no change. Been thinking if IBM at some point sold some DDYS's as pure UW 40MB/s disks, to satisfy the market... Out of ideas, except flashing the controller. Latest BIOS should do some BIOS optimizations and device order stuff, whatever that means. > -----Original Message----- > From: linux-scsi-owner@vger.kernel.org > [mailto:linux-scsi-owner@vger.kernel.org] On Behalf Of Mogens Valentin > Sent: Friday, May 07, 2004 7:57 AM > To: Linux-scsi > Subject: SCSI vs SATA considerations > > On a new DDR400, 2200MHz cpu, system, using 29160 with an IBM DDYS disk, > I get 37MB/s. For reasons I don't understand, the DDYS won't negotiate > at 80MB/s, will only do 40MB/s. -- Kind regards, Mogens Valentin Networking, Security www.danbbs.dk/~monz Phone +45 32 525 878