From owner-freebsd-current Sat Mar 4 17:58:54 1995 Return-Path: current-owner Received: (from majordom@localhost) by freefall.cdrom.com (8.6.10/8.6.6) id RAA22223 for current-outgoing; Sat, 4 Mar 1995 17:58:54 -0800 Received: from troutmask.apl.washington.edu (troutmask.apl.washington.edu [128.95.97.216]) by freefall.cdrom.com (8.6.10/8.6.6) with ESMTP id RAA22217 for ; Sat, 4 Mar 1995 17:58:53 -0800 Received: (from kargl@localhost) by troutmask.apl.washington.edu (8.6.10/8.6.9) id RAA00135 for freebsd-current@freefall.cdrom.com; Sat, 4 Mar 1995 17:52:34 -0800 From: Steven G Kargl Message-Id: <199503050152.RAA00135@troutmask.apl.washington.edu> Subject: poor SCSI disk performance To: freebsd-current@freefall.cdrom.com (FreeBSD Current) Date: Sat, 4 Mar 1995 17:52:33 -0800 (PST) X-Mailer: ELM [version 2.4 PL24] Content-Type: text Content-Length: 832 Sender: current-owner@FreeBSD.org Precedence: bulk Sources supped on 950303 at 1700 PST. I did a make world, and supped /sys today 950304 at 1645 PST to rebuild the kernel. So, I have the recently revamped SCSI stuff in my system. The system is 486DX66, Adaptec 1742, Maxtor mxt-540-s. `Iozone 16' reports roughly 850KB/s write and 1MB/s read. I looked into using tunefs to improve performance, but nothing I tried seemed to give better results. I should also point out the system fragmentation is below 3%. With the exact hardware and FBSD 1.1.5.1, I was getting numbers around 1.5 to 2MB/s write and 3MB/s read. -- Steven G. Kargl | Phone: 206-685-4677 | Applied Physics Laboratory | Fax: 206-543-6785 | University of Washington |---------------------| 1013 NE 40th St | FreeBSD 2.1-current | Seattle, WA 98105 |---------------------|