From owner-freebsd-stable Thu Feb 20 9:41:43 2003 Delivered-To: freebsd-stable@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 905B137B401 for ; Thu, 20 Feb 2003 09:41:42 -0800 (PST) Received: from rootlabs.com (root.org [67.118.192.226]) by mx1.FreeBSD.org (Postfix) with SMTP id 6211843FCB for ; Thu, 20 Feb 2003 09:41:40 -0800 (PST) (envelope-from nate@rootlabs.com) Received: (qmail 51525 invoked by uid 1000); 20 Feb 2003 17:41:37 -0000 Date: Thu, 20 Feb 2003 09:41:37 -0800 (PST) From: Nate Lawson To: Daniel O'Connor Cc: FreeBSD Stable List , freebsd-scsi@freebsd.org Subject: Re: Curious SCSI and/or Firewire Problem In-Reply-To: <1045730822.40318.19.camel@chowder.gsoft.com.au> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-stable@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG On 20 Feb 2003, Daniel O'Connor wrote: > I am testing a firewire enclosure and a SCSI card. The SCSI card is an > Init-IO 940/950 and I obtained a driver from someone who back ported it > from OpenBSD (hopefully it will be committed soon :) > > I notice that the firewire enclosure does ~20-25Mb/sec by itself, and > the SCSI disk (old slow 1Gb) does 4.5Mb/sec by itself. If I run them > both they act very bursty - neither runs at full usage all of the time, > or at top speed. You can get more info with "camcontrol debug -T all". Or the information may be under -I. Either way, my suspicion is that the old drive is holding the bus for a long time. Also, do "ps axl" between bursts to see where your dd process is blocked. -Nate To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message