Date: Fri, 11 Aug 2000 03:37:28 -0400 From: "Gary T. Corcoran" <garycor@home.com> To: Francisco Reyes <fran@reyes.somos.net> Cc: Michael VanLoon <MichaelV@EDIFECS.COM>, FreeBSD Hardware List <freebsd-hardware@FreeBSD.ORG> Subject: Re: Best behaved drives for FreeBSD? Message-ID: <3993AD38.29D3B47B@home.com> References: <200008110717.DAA11000@sanson.reyes.somos.net>
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Francisco Reyes wrote: > > On Fri, 11 Aug 2000 00:14:42 -0700, Michael VanLoon wrote: > > >Actually, from what I understand, the cables from ATA33 and lower are > >different from the ATA66 cable, and the ATA66 cable is also used by ATA100. > >I'm not an expert on this, however. > > I got a good reply yesterday that explained this. > ATA66 drives need different cables from ATA33 to work on ATA66 True. > ATA100 drives need yet different cables from ATA33 and ATA66 > > ATA100 drives will work with ATA66 cables, but will downgrade to > ATA66 speeds. 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. In other words, Michael VanLoon was correct. It's only if you use an ATA66 *controller* that the ATA100 drives will downgrade to ATA66 speeds, transparently. > Don't really know about ATA33 cables, but I think they have a > different number of pins. No, same number of pins. It's just that the ATA66/100 cables have 40 ground wires, a total of 80 *wires* in the cable, connected to the same 40 pin connectors, versus the 40 wires connected to 40 pins in the ATA33 cables... Gary To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hardware" in the body of the message
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