From owner-freebsd-current Wed May 20 06:26:25 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id GAA04182 for freebsd-current-outgoing; Wed, 20 May 1998 06:26:25 -0700 (PDT) (envelope-from owner-freebsd-current@FreeBSD.ORG) Received: from goliath.camtech.net.au (goliath.camtech.net.au [203.5.73.2]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id GAA04173; Wed, 20 May 1998 06:26:21 -0700 (PDT) (envelope-from thyerm@camtech.net.au) Received: from camtech.net.au (dialup-ad-4-03.camtech.net.au [203.28.0.131]) by goliath.camtech.net.au (8.8.5/8.8.2) with ESMTP id WAA20893; Wed, 20 May 1998 22:53:09 +0930 (CST) Message-ID: <3562D956.8682E5D1@camtech.net.au> Date: Wed, 20 May 1998 22:53:34 +0930 From: Matthew Thyer X-Mailer: Mozilla 4.05 [en] (X11; U; FreeBSD 3.0-CURRENT i386) MIME-Version: 1.0 To: sos@FreeBSD.ORG CC: Luigi Rizzo , hasty@rah.star-gate.com, regnauld@deepo.prosa.dk, current@FreeBSD.ORG Subject: Re: ATAPI CDDA Extraction under FreeBSD References: <199805182006.WAA00312@sos.freebsd.dk> Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG I'm sure I've seen multi block IO of 32 on one drive so don't rule out 16K. Maybe it was the Maxtor that blew up the other month... not sure. I dont have that drive any more so I can't give details. Søren Schmidt wrote: > > In reply to Luigi Rizzo who wrote: > > > It should be possible, at least it seems so from testing... > > > Big multi sector transfers post a problem though... > > > > how big is big ? is it 64K or it can be much larger ? In any case, > > it should not be much of a problem given that several atapi drives can > > transfer audio faster than 1x, so a small buffer should suffice. > > No most (if not all) disks I've seen has a max of 16 secs at once > ie 8K... > > > (and in any case, i fail to see why one would want to grab live > > digital audio data from a CD to pump it straight into the DAC of > > the audio card, when there is a direct analog connection that would > > consume zero cpu and zero bus bandwidth...) > > Exactly... > > -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- > Søren Schmidt (sos@FreeBSD.org) FreeBSD Core Team > Even more code to hack -- will it ever end > .. > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-current" in the body of the message -- /=====================================================================\ |Work: Matthew.Thyer@dsto.defence.gov.au | Home: thyerm@camtech.net.au| \=====================================================================/ "If it is true that our Universe has a zero net value for all conserved quantities, then it may simply be a fluctuation of the vacuum of some larger space in which our Universe is imbedded. In answer to the question of why it happened, I offer the modest proposal that our Universe is simply one of those things which happen from time to time." E. P. Tryon from "Nature" Vol.246 Dec.14, 1973 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message