From owner-freebsd-fs Sun Aug 22 17:26:18 1999 Delivered-To: freebsd-fs@freebsd.org Received: from bastard.40ounce.net (bastard.40ounce.net [206.14.239.252]) by hub.freebsd.org (Postfix) with ESMTP id 95B8314C23 for ; Sun, 22 Aug 1999 17:26:13 -0700 (PDT) (envelope-from jb@syndicate.net) Received: from syndicate.net (adsl-209-233-31-199.dsl.snfc21.pacbell.net [209.233.31.199]) by bastard.40ounce.net (8.8.8/8.8.8) with ESMTP id RAA16079 for ; Sun, 22 Aug 1999 17:26:35 -0700 (PDT) (envelope-from jb@syndicate.net) Message-ID: <37C0951B.837EA807@syndicate.net> Date: Sun, 22 Aug 1999 17:26:03 -0700 From: James Brown Reply-To: jb@syndicate.net Organization: SYNDICATE Consulting Group, Inc. X-Mailer: Mozilla 4.5 [en] (X11; U; FreeBSD 2.2.8-STABLE i386) X-Accept-Language: en MIME-Version: 1.0 To: freebsd-fs@freebsd.org Subject: ccd striped array slower than single disk! Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-freebsd-fs@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org hello, bonnie reports 5636 K/s when using a single disk without ccd. i've been testing ccd performance, using various interleaves. the best performance i've seen striping with ccd has been 5571 K/s using an interleave of 32768. these are identical disks (maxtor 27.2 gb) and are on two separate ultra dma/33 busses (one is bus 1 slave, other is bus 2 master but that shouldn't matter, right?). shouldn't i be seeing something closer to 9000 or 10000 K/s? thank you, james To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-fs" in the body of the message