Date: Fri, 18 Aug 2000 14:04:57 -0700 From: Parag Patel <parag@cgt.com> To: Robert Sexton <robert@kudra.com> Cc: Jonathan Laventhol <jonathan.laventhol@imagination.co.uk>, freebsd-hackers@FreeBSD.ORG Subject: Re: Cheap 1000Gbyte machine Message-ID: <3689.966632697@pinhead.parag.codegen.com> In-Reply-To: Message from Robert Sexton <robert@kudra.com> of "Fri, 18 Aug 2000 15:57:48 EDT." <20000818155748.A42398@tabby.kudra.com>
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On Fri, 18 Aug 2000 15:57:48 EDT, Robert Sexton wrote: > >Can IDE drives release the bus during seeks? Historically thats been >the big advantage of SCSI: Two IDE drives are no faster than one IDE >drive, while SCSI scales in performance. How about a single IDE (master) drive per controller, that is, no slave drives at all? This would halve the number of available drives per card (or require twice the number of cards) but essentially would use the PCI bus as a multiplex bus between drives instead of SCSI. You're still pretty much stuck waiting for one command to finish before another can be sent to a drive though, unlike SCSI drives. Still a lot cheaper tho'. I suppose another trick would be to arrange your vinum partitions and drive layout so that master and slave drives are never accessed simultaneously so one won't block access to the other. -- Parag Patel To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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