From owner-aic7xxx Mon Aug 24 11:56:03 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id LAA16713 for aic7xxx-outgoing; Mon, 24 Aug 1998 11:56:03 -0700 (PDT) (envelope-from owner-aic7xxx@FreeBSD.ORG) Received: from dledford.dialnet.net (dledford.dialnet.net [206.65.249.116]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id LAA16684 for ; Mon, 24 Aug 1998 11:55:56 -0700 (PDT) (envelope-from dledford@dialnet.net) Received: from dialnet.net (localhost [127.0.0.1]) by dledford.dialnet.net (8.8.5/8.8.4) with ESMTP id NAA20601; Mon, 24 Aug 1998 13:54:43 -0500 Message-ID: <35E1B6F3.C48423B1@dialnet.net> Date: Mon, 24 Aug 1998 13:54:43 -0500 From: Doug Ledford X-Mailer: Mozilla 4.05 [en] (X11; I; Linux 2.1.115 i686) MIME-Version: 1.0 To: Brian Ristuccia CC: AIC7770 List Subject: Re: Micropolis 3387NS and Tagged Queueing References: Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-aic7xxx@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org Brian Ristuccia wrote: > > Does anyone know the maximum safe queue depth for this drive and my > aic7xxx controller? > > It looks like tagged queueing is currently disabled. Any idea what the > performance penalty is for this? I've heard of data corruption problems with some Micropolis drives and tagged queueing. To be on the safe side, I would simply leave it disabled on Micropolis drives. The performance hit you take from this varies from drive to drive depending on the quality of the drives firmware. -- Doug Ledford Opinions expressed are my own, but they should be everybody's. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-aic7xxx" in the body of the message