From owner-freebsd-stable Mon Mar 12 19:29:34 2001 Delivered-To: freebsd-stable@freebsd.org Received: from freefall.freebsd.org (freefall.freebsd.org [216.136.204.21]) by hub.freebsd.org (Postfix) with ESMTP id 2B5D537B719 for ; Mon, 12 Mar 2001 19:29:33 -0800 (PST) (envelope-from jmz@FreeBSD.org) Received: (from jmz@localhost) by freefall.freebsd.org (8.11.1/8.11.1) id f2D3TXN73556; Mon, 12 Mar 2001 19:29:33 -0800 (PST) (envelope-from jmz@FreeBSD.org) Date: Mon, 12 Mar 2001 19:29:33 -0800 (PST) Message-Id: <200103130329.f2D3TXN73556@freefall.freebsd.org> X-Authentication-Warning: freefall.freebsd.org: jmz set sender to jmz@FreeBSD.org using -f From: Jean-Marc Zucconi To: freebsd-stable@FreeBSD.org Subject: UDMA 33/UDMA 100 perfs X-Mailer: Emacs 20.7.1 Sender: owner-freebsd-stable@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG Is this the normal behavior expected? 1) ata0-master: DMA limited to UDMA33, non-ATA66 compliant cable ad0: 19092MB [38792/16/63] at ata0-master using UDMA33 # dd if=/dev/ad0e of=/dev/null bs=1m count=1000 1048576000 bytes transferred in 49.445390 secs (21206750 bytes/sec) 2) ad0: 19092MB [38792/16/63] at ata0-master UDMA100 # dd if=/dev/ad0e of=/dev/null bs=1m count=1000 1048576000 bytes transferred in 49.337278 secs (21253220 bytes/sec) I get the same performance in both cases. This is with a 4.3-BETA kernel. I have only one drive on the IDE bus. Jean-Marc -- Jean-Marc Zucconi -- PGP Key: finger jmz@FreeBSD.org [KeyID: 400B38E9] To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message