From owner-freebsd-stable Fri Apr 24 18:12:48 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id SAA14517 for freebsd-stable-outgoing; Fri, 24 Apr 1998 18:12:48 -0700 (PDT) (envelope-from owner-freebsd-stable@FreeBSD.ORG) Received: from dingo.cdrom.com (dingo.cdrom.com [204.216.28.145]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id SAA14493; Fri, 24 Apr 1998 18:12:35 -0700 (PDT) (envelope-from mike@dingo.cdrom.com) Received: from dingo.cdrom.com (localhost [127.0.0.1]) by dingo.cdrom.com (8.8.8/8.8.5) with ESMTP id SAA02337; Fri, 24 Apr 1998 18:08:35 -0700 (PDT) Message-Id: <199804250108.SAA02337@dingo.cdrom.com> X-Mailer: exmh version 2.0zeta 7/24/97 To: Bruce Evans cc: mike@smith.net.au, dburr@POBoxes.com, hardware@FreeBSD.ORG, stable@FreeBSD.ORG, Studded@san.rr.com Subject: Re: best wdc0 flags ? In-reply-to: Your message of "Tue, 21 Apr 1998 02:50:39 +1000." <199804201650.CAA05910@godzilla.zeta.org.au> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Fri, 24 Apr 1998 18:08:35 -0700 From: Mike Smith Sender: owner-freebsd-stable@FreeBSD.ORG Precedence: bulk > >> I thought I did, but my oldest accessible drive (all 400MB of it from > >> 4 years ago) supports them. The probe seems to handle any that don't. > > > >OK. Should we make it the default then? > > In -current. Sure. 8) > >> Setting the multi-block flag is not such a good optimization, since it > >> pessimizes throughput on some drives and it increases interrupt latency. > > > >Can you qualify "some drives" again? The overall performance > >improvement in general use is marked, and it decreases interrupt load > >in the DMA case. > > Old drives. Ok. Do we have general consensus then that the defaults should be: - 32-bit transfers. - multi-block 4, if supported by the drive. ??? -- \\ Sometimes you're ahead, \\ Mike Smith \\ sometimes you're behind. \\ mike@smith.net.au \\ The race is long, and in the \\ msmith@freebsd.org \\ end it's only with yourself. \\ msmith@cdrom.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message