From owner-freebsd-scsi Thu Oct 11 14:18:37 2001 Delivered-To: freebsd-scsi@freebsd.org Received: from aslan.scsiguy.com (aslan.scsiguy.com [63.229.232.106]) by hub.freebsd.org (Postfix) with ESMTP id 594DB37B403 for ; Thu, 11 Oct 2001 14:18:34 -0700 (PDT) Received: from scsiguy.com (localhost [127.0.0.1]) by aslan.scsiguy.com (8.11.5/8.11.5) with ESMTP id f9BLGYY01854; Thu, 11 Oct 2001 15:16:34 -0600 (MDT) (envelope-from gibbs@scsiguy.com) Message-Id: <200110112116.f9BLGYY01854@aslan.scsiguy.com> To: Alexey Koptsevich Cc: Scott Long , scsi@FreeBSD.ORG Subject: Re: one array from both channels in Adaptec 3210S? In-Reply-To: Your message of "Thu, 11 Oct 2001 23:09:49 +0200." Date: Thu, 11 Oct 2001 15:16:34 -0600 From: "Justin T. Gibbs" Sender: owner-freebsd-scsi@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org >> It follows the law of dimishing returns. Every disk that you add will >> increase performance my a lower factor than the previous. You also >> have to remember that performace is also based on the PCI bus and >> the CPU on the controller. If the card is only in a PCI 33MHz/32Bit >> slot, you can only get 132MB/s max (actually much less than that in >> real life). > >And what is the throughput of 66MHz/32bit PCI on my Intel L440GX+ >motherboard? Supposedly the bridge used to get you those 66MHz slots has some very poor performance characteristics. You'd be better off using the 33MHz slots on your machine. -- Justin To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message