From owner-freebsd-smp Wed Oct 7 11:12:14 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id LAA13548 for freebsd-smp-outgoing; Wed, 7 Oct 1998 11:12:14 -0700 (PDT) (envelope-from owner-freebsd-smp@FreeBSD.ORG) Received: from gilberto.physik.RWTH-Aachen.DE (gilberto.physik.rwth-aachen.de [137.226.30.2]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id LAA13449 for ; Wed, 7 Oct 1998 11:12:01 -0700 (PDT) (envelope-from kuku@gilberto.physik.RWTH-Aachen.DE) Received: (from kuku@localhost) by gilberto.physik.RWTH-Aachen.DE (8.8.8/8.8.7) id UAA00810; Wed, 7 Oct 1998 20:12:02 +0200 (MEST) (envelope-from kuku) Message-ID: <19981007201201.A795@gil.physik.rwth-aachen.de> Date: Wed, 7 Oct 1998 20:12:01 +0200 From: Christoph Kukulies To: Adrian Filipi-Martin , James Mansion Cc: Steve Passe , vanmaren@fast.cs.utah.edu, freebsd-smp@FreeBSD.ORG, kuku@gilberto.physik.RWTH-Aachen.DE Subject: Re: hw platform Q - what's a good smp choice these days? References: <32BABEF63EAED111B2C5204C4F4F502017F7@WGP01> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 0.91 In-Reply-To: ; from ADRIAN Filipi-Martin on Wed, Oct 07, 1998 at 09:51:19AM -0400 Sender: owner-freebsd-smp@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org On Wed, Oct 07, 1998 at 09:51:19AM -0400, ADRIAN Filipi-Martin wrote: > On Mon, 5 Oct 1998, James Mansion wrote: > > > Its all very well, but SCSI disks are a LOT more expensive than IDE > > ones. > > > > Might be faster IO per drive with SCSI, but I'd rather have twice the > > capacity and spend the remainder on more RAM. > > > > James > > Well, IDE tends to use significantly more CPU for IO than SCSI. > Isn't that what does all the DMA work for IDE? If you have cycles to As far as I understand, using Ultra DMA (IDE DMA) doesn't burn cycles since it works like bus master DMA and FreeBSD supports it, doesn't it? > burn, why pay for an SMP configuration? I wouldn't recommend IDE on > anything but a single user machine, because of the synchronous access to > the drives. (Has the sycnhronous drive access been dropped from EIDE? I > don't follow IDE developments much.) > > Adrian > -- > [ adrian@ubergeeks.com -- Ubergeeks Consulting -- http://www.ubergeeks.com/ ] -- --Chris Christoph P. U. Kukulies kuku@gil.physik.rwth-aachen.de To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-smp" in the body of the message