From owner-freebsd-alpha Fri Sep 25 23:32:58 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id XAA26857 for freebsd-alpha-outgoing; Fri, 25 Sep 1998 23:32:58 -0700 (PDT) (envelope-from owner-freebsd-alpha@FreeBSD.ORG) Received: from panzer.plutotech.com (panzer.plutotech.com [206.168.67.125]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id XAA26850 for ; Fri, 25 Sep 1998 23:32:55 -0700 (PDT) (envelope-from ken@panzer.plutotech.com) Received: (from ken@localhost) by panzer.plutotech.com (8.9.1/8.8.5) id AAA09812; Sat, 26 Sep 1998 00:32:48 -0600 (MDT) From: "Kenneth D. Merry" Message-Id: <199809260632.AAA09812@panzer.plutotech.com> Subject: one other thing... To: freebsd-alpha@FreeBSD.ORG Date: Sat, 26 Sep 1998 00:32:48 -0600 (MDT) Cc: gibbs@pluto.plutotech.com, imp@pluto.plutotech.com X-Mailer: ELM [version 2.4ME+ PL28s (25)] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-freebsd-alpha@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org Justin and I discovered that write caching was turned off on the 2gig DEC OEM Barracudas that came with the Miata. Enabling write caching improved performance a good bit. To check for that, do this: subway# camcontrol modepage -n da -u 0 -m 8 IC: 0 ABPF: 0 CAP: 0 DISC: 1 SIZE: 0 WCE: 0 MF: 0 RCD: 0 Demand Retention Priority: 0 Write Retention Priority: 0 Disable Pre-fetch Transfer Length: 65535 Minimum Pre-fetch: 0 Maximum Pre-fetch: 65535 Maximum Pre-fetch Ceiling: 65535 Notice that WCE is set to 0. Set it to 1 to enable write caching. You can edit the mode page like this: camcontrol modepage -n da -u 0 -m 8 -P 3 -e Ken -- Kenneth Merry ken@plutotech.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-alpha" in the body of the message