Date: Fri, 11 Aug 2000 04:00:47 -0400 From: "Francisco Reyes" <fran@reyes.somos.net> To: "Gary T. Corcoran" <garycor@home.com> Cc: "FreeBSD Hardware List" <freebsd-hardware@FreeBSD.ORG>, "Michael VanLoon" <MichaelV@EDIFECS.COM> Subject: Re: Best behaved drives for FreeBSD? Message-ID: <200008110751.DAA11086@sanson.reyes.somos.net> In-Reply-To: <3993AD38.29D3B47B@home.com>
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On Fri, 11 Aug 2000 03:37:28 -0400, Gary T. Corcoran wrote: >I don't think so. My understanding is that ATA100 uses the *same* >cables as ATA66 - they were just able to squeeze another 33MHz of >performance out of them. No. From http://www.ixbt-labs.com/storage/ata-100.html Having weighed all pro and contra, Quantum developed a new ATA/100 interface with additional speed, which allows transferring the data at 100MB/sec along the host-to-drive bus and hence to unload the HDD buffer memory. This new interface incorporates all the innovations made to the cables and connectors supporting ATA/66. Just to remind you let us say once again that ATA/100 interface requires the same good old 40-pin IDE cable used in ATA/66. However, since the burst transfer rates have become considerably higher, better protection against crosstalk and electromagnetic noise interference turned out necessary. For this particular purpose 40 additional ground lines were tied together and acted as shields between the lines that actually carried live signals back and forth. So, altogether the new ATA/100 cable is composed of 80 conductors. However, the developers wanted to retain the conventional 40-pin connector, so that to ensure plug compatibility with existing drives and systems. francisco Moderator of the Corporate BSD list http://www.egroups.com/group/BSD_Corporate To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hardware" in the body of the message
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