From owner-freebsd-questions Thu May 30 14:38:57 2002 Delivered-To: freebsd-questions@freebsd.org Received: from Danovitsch.dnsq.org (b74143.upc-b.chello.nl [212.83.74.143]) by hub.freebsd.org (Postfix) with ESMTP id EAAA437B40C for ; Thu, 30 May 2002 14:38:42 -0700 (PDT) Received: from FreeBSD.Danovitsch.LAN (b83007.upc-b.chello.nl [212.83.83.7]) by Danovitsch.dnsq.org (8.11.3/8.11.3) with SMTP id g4ULb2I10390; Thu, 30 May 2002 23:37:08 +0200 (CEST) (envelope-from Danovitsch@Danovitsch.dnsq.org) Content-Type: text/plain; charset="iso-8859-1" From: "Daan Vreeken [PA4DAN]" Reply-To: Danovitsch@Danovitsch.dnsq.org To: inspector.us@omicnet.com Subject: Re: DMA Date: Thu, 30 May 2002 23:46:14 +0200 X-Mailer: KMail [version 1.2] References: <9573FDTSUR2XQMB7972WGDGYGAD08.3cf55144@inspector2> In-Reply-To: <9573FDTSUR2XQMB7972WGDGYGAD08.3cf55144@inspector2> Cc: FreeBSD-Questions@FreeBSD.org MIME-Version: 1.0 Message-Id: <02053023461402.06185@FreeBSD.Danovitsch.LAN> Content-Transfer-Encoding: 8bit Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG On Thursday 30 May 2002 00:08, you wrote: > I am using round, 80-wire, ATA-100 IDE cables. FreeBSD 4.5 release. > dmesg shows > ata0 #ATA 33 (no ATA 66 compliant cable), so both drives on that channel > default to PIO mode. Do I need to use different cables? I was under the > impression that default was DMA if possible. The IDE bus uses the highest speed all devices can handle. So if you connect a UDMA100 harddisk with a UDMA33 CDROM to the same cable, the CDROM will force the bus to UDMA33. Connecting all your "slow" devices to the secondary controller should fix the problem (on the primary controller :). -- Control the lights in my room: http://www.Danovitsch.dnsq.org/webcam Moo, ]:8) To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message