Date: Wed, 26 May 2004 07:51:03 +1000 From: Peter Jeremy <peter.jeremy@alcatel.com.au> To: ticso@cicely.de Cc: freebsd-alpha@freebsd.org Subject: Re: FBSD 4.9 on AlphaServer 1000a/400 Message-ID: <20040525215103.GA10792@gsmx07.alcatel.com.au> In-Reply-To: <20040519160523.GX70900@cicely12.cicely.de> References: <005c01c43d21$d6c3ae60$6a0aa8c0@sassie.net> <20040519130709.Q77039@ns> <20040519160523.GX70900@cicely12.cicely.de>
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On 2004-May-19 18:05:23 +0200, Bernd Walter <ticso@cicely12.cicely.de> 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
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