Date: Thu, 20 Feb 2003 09:41:37 -0800 (PST) From: Nate Lawson <nate@root.org> To: Daniel O'Connor <doconnor@gsoft.com.au> Cc: FreeBSD Stable List <freebsd-stable@freebsd.org>, freebsd-scsi@freebsd.org Subject: Re: Curious SCSI and/or Firewire Problem Message-ID: <Pine.BSF.4.21.0302200937500.51468-100000@root.org> In-Reply-To: <1045730822.40318.19.camel@chowder.gsoft.com.au>
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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-scsi" in the body of the message
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