From owner-freebsd-alpha@FreeBSD.ORG Tue May 25 14:51:47 2004 Return-Path: Delivered-To: freebsd-alpha@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id B305016A4CE for ; Tue, 25 May 2004 14:51:47 -0700 (PDT) Received: from alcanet.com.au (mail2.alcanet.com.au [203.62.196.17]) by mx1.FreeBSD.org (Postfix) with ESMTP id 9839B43D39 for ; Tue, 25 May 2004 14:51:44 -0700 (PDT) (envelope-from peter.jeremy@alcatel.com.au) Received: from sydsmtp02.alcatel.com.au (IDENT:root@localhost.localdomain [127.0.0.1])i4PLp6LX004554; Wed, 26 May 2004 07:51:06 +1000 Received: from gsmx07.alcatel.com.au ([139.188.20.247]) by sydsmtp02.alcatel.com.au (Lotus Domino Release 5.0.12) with ESMTP id 2004052607510559:29165 ; Wed, 26 May 2004 07:51:05 +1000 Received: from gsmx07.alcatel.com.au (localhost [127.0.0.1]) i4PLp5mZ010858; Wed, 26 May 2004 07:51:05 +1000 (EST) (envelope-from peter.jeremy@alcatel.com.au) Received: (from pjeremy@localhost) by gsmx07.alcatel.com.au (8.12.9p2/8.12.9/Submit) id i4PLp43x010857; Wed, 26 May 2004 07:51:04 +1000 (EST) (envelope-from peter.jeremy@alcatel.com.au) Date: Wed, 26 May 2004 07:51:03 +1000 From: Peter Jeremy To: ticso@cicely.de Message-ID: <20040525215103.GA10792@gsmx07.alcatel.com.au> Mail-Followup-To: ticso@cicely.de, freebsd-alpha@freebsd.org References: <005c01c43d21$d6c3ae60$6a0aa8c0@sassie.net> <20040519130709.Q77039@ns> <20040519160523.GX70900@cicely12.cicely.de> Mime-Version: 1.0 In-Reply-To: <20040519160523.GX70900@cicely12.cicely.de> User-Agent: Mutt/1.4.2i X-MIMETrack: Itemize by SMTP Server on SYDSMTP02/AlcatelAustralia(Release 5.0.12 |February 13, 2003) at 26/05/2004 07:51:05 AM,|February 13, 2003) at 26/05/2004 07:51:07 AM, Serialize complete at 26/05/2004 07:51:07 AM Content-Type: text/plain; charset=us-ascii Content-Disposition: inline cc: freebsd-alpha@freebsd.org Subject: Re: FBSD 4.9 on AlphaServer 1000a/400 X-BeenThere: freebsd-alpha@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Porting FreeBSD to the Alpha List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 25 May 2004 21:51:47 -0000 On 2004-May-19 18:05:23 +0200, Bernd Walter wrote: >AFAIK the 960 can't handle drives with sizes greater than 8G and >some firmware revisions even with drives >2G, but I'm not shure with it. >Have this drives ever been in use with this controller? We have a significant number of KZPAC (Mylex DAC960) controllers in use and looked into this issue a few years ago. I haven't seen any references to a 2GB limit. DEC/Compaq/HP state that the maximum drive size is 9.1GB. We have experimented with JBOD volumes using larger disks (18GB and 36GB) - which seem to work successfully. Note that block addresses wrap around at 32GB - the configuration utility recognizes that the 36GB disk has 36GB but wraps the top 4GB over the bottom 4GB - which is undesirable. We didn't try creating multiple logical volumes on a single physical disk. (Those with long memories will recall the same problem when the first >1GB disks started appearing before people had updated their SCSI driver software to use 10-byte commands (32-bit LBA) instead of 6-byte commands (20-bit LBA)). -- Peter Jeremy