From owner-freebsd-current  Thu Aug  7 22:51:04 1997
Return-Path: <owner-freebsd-current>
Received: (from root@localhost)
          by hub.freebsd.org (8.8.5/8.8.5) id WAA24823
          for current-outgoing; Thu, 7 Aug 1997 22:51:04 -0700 (PDT)
Received: from zippy.dyn.ml.org (garbanzo@sfmax3-4.ppp.wenet.net [206.80.14.4])
          by hub.freebsd.org (8.8.5/8.8.5) with ESMTP id WAA24812;
          Thu, 7 Aug 1997 22:50:58 -0700 (PDT)
Received: from localhost (garbanzo@localhost)
	by zippy.dyn.ml.org (8.8.6/8.8.5) with SMTP id WAA02129;
	Thu, 7 Aug 1997 22:50:47 -0700 (PDT)
X-Authentication-Warning: zippy.dyn.ml.org: garbanzo owned process doing -bs
Date: Thu, 7 Aug 1997 22:50:46 -0700 (PDT)
From: Alex <garbanzo@hooked.net>
X-Sender: garbanzo@zippy.dyn.ml.org
To: Atipa <freebsd@atipa.com>
cc: "John S. Dyson" <toor@dyson.iquest.net>, dyson@FreeBSD.ORG,
        ggm@connect.com.au, current@FreeBSD.ORG
Subject: Re: IDE vs SCSI was: flags 80ff works (like anybody doubted it)
In-Reply-To: <Pine.BSF.3.91.970807225059.4717A-100000@dot.ishiboo.com>
Message-ID: <Pine.BSF.3.96.970807224756.2073F-100000@zippy.dyn.ml.org>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
Sender: owner-freebsd-current@FreeBSD.ORG
X-Loop: FreeBSD.org
Precedence: bulk



On Thu, 7 Aug 1997, Atipa wrote:

> 
> My thoughts exactly. Depending on the card and driver level, SCSI is 
> actually slower in many cases. Similar IDE drives outperformed SCSIs 
> unsing a 2940UW w/ 2.1.5-RELEASE. 2.2 kernels and above have noticably 
> faster Adaptec drivers. Haven't played much with the NCR, but I 
> think I heard the ncr.c does not support ultra or ultra-wide. True?
 
My AHA-1542 with a Quantum Lightning was glacial, the oldish WD 212mb hdd
I had out preformed it easily.

> I definitely recommend IDE for workstations and medium demand servers.
> However, SCSI will still have its market. When expandability and performance
> are key, SCSI is the only solution (for now!). Maybe fibre-channel will
> start to get more popular... 

No way.  Any server is usually mission critical, and parity checking is a
MUST for anything near mission critical. IDE doesn't do that. IMO a big no
no. That and from what I've heard scsi outpreforms ide with multiple
commands and the like, a simple dd if=/dev/zero won't show this at all.
 
> Kevin 

- alex