From owner-freebsd-hackers Tue Jun 3 08:06:34 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.5/8.8.5) id IAA02872 for hackers-outgoing; Tue, 3 Jun 1997 08:06:34 -0700 (PDT) Received: from pluto.plutotech.com (root@pluto100.plutotech.com [206.168.67.137]) by hub.freebsd.org (8.8.5/8.8.5) with ESMTP id IAA02867 for ; Tue, 3 Jun 1997 08:06:32 -0700 (PDT) Received: from narnia.plutotech.com (narnia.plutotech.com [206.168.67.130]) by pluto.plutotech.com (8.8.5/8.8.5) with ESMTP id JAA04331; Tue, 3 Jun 1997 09:02:41 -0600 (MDT) Message-Id: <199706031502.JAA04331@pluto.plutotech.com> X-Mailer: exmh version 2.0beta 12/23/96 To: Luigi Rizzo cc: toor@dyson.iquest.net (John S. Dyson), hackers@FreeBSD.ORG Subject: Re: DMA for IDE drives ? In-reply-to: Your message of "Tue, 03 Jun 1997 12:41:14 +0200." <199706031041.MAA25969@labinfo.iet.unipi.it> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Tue, 03 Jun 1997 09:58:58 -0600 From: "Justin T. Gibbs" Sender: owner-hackers@FreeBSD.ORG X-Loop: FreeBSD.org Precedence: bulk Do the newer IDE drives support any concept similar to tagged queueing? Perhaps via EATA? Supporting DMA is only half the battle in my mind as you won't get anywhere near the throughput of a SCSI drive if you can't schedule and have the drive reorder multiple transactions at a time. -- Justin T. Gibbs =========================================== FreeBSD: Turning PCs into workstations ===========================================