From owner-freebsd-questions Sun May 31 16:29:24 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id QAA12776 for freebsd-questions-outgoing; Sun, 31 May 1998 16:29:24 -0700 (PDT) (envelope-from owner-freebsd-questions@FreeBSD.ORG) Received: from freebie.lemis.com (freebie.lemis.com [139.130.136.133]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id QAA12754 for ; Sun, 31 May 1998 16:28:47 -0700 (PDT) (envelope-from grog@freebie.lemis.com) Received: (from grog@localhost) by freebie.lemis.com (8.9.0/8.9.0) id IAA25679; Mon, 1 Jun 1998 08:58:29 +0930 (CST) Message-ID: <19980601085829.F22406@freebie.lemis.com> Date: Mon, 1 Jun 1998 08:58:29 +0930 From: Greg Lehey To: Karl Pielorz , Jake Cc: freebsd-questions@FreeBSD.ORG Subject: Re: some ccd questions References: <199805302220.SAA01012@elephants.dyn.ml.org> <35712DAC.29146FCA@tdx.co.uk> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 0.91.1i In-Reply-To: <35712DAC.29146FCA@tdx.co.uk>; from Karl Pielorz on Sun, May 31, 1998 at 11:15:08AM +0100 WWW-Home-Page: http://www.lemis.com/~grog Organization: LEMIS, PO Box 460, Echunga SA 5153, Australia Phone: +61-8-8388-8286 Fax: +61-8-8388-8725 Mobile: +61-41-739-7062 Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Sun, 31 May 1998 at 11:15:08 +0100, Karl Pielorz wrote: > Jake wrote: >> Maybe I'll be able to capture video from my bt848 without the system being >> completely bogged down by disk access. > > If they are all IDE drives (which it looks like they are), and you don't > have any bus-mastering DMA (which you can only get in 3.0-CURRENT) I would > suggest you don't use CCD... > > The amount of CPU time needed to run IDE drives is quite a lot, to run two > drives at the same time - is going to be twice as bad... Right, but that's the tradeoff for doubling the througput. > Considering your goals of putting swap on them as well, and only using them > for parts of the disk I'd say your probably better off just mounting the > extra drive somewhere... I don't see that that solves anything. Greg -- See complete headers for address and phone numbers finger grog@lemis.com for PGP public key To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message