Date: Wed, 14 Nov 2001 09:19:30 -0500 From: Carroll Kong <damascus@home.com> To: bv@wjv.com Cc: stable@FreeBSD.ORG, freebsd-stable-digest@FreeBSD.ORG Subject: Re: ATA hard drives Message-ID: <5.1.0.14.2.20011114091338.03464ec0@netmail.home.com> In-Reply-To: <20011114051132.A12369@wjv.com> References: <bulk.37366.20011114002208@hub.freebsd.org> <bulk.37366.20011114002208@hub.freebsd.org>
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At 05:11 AM 11/14/01 -0500, Bill Vermillion wrote: > > Date: Tue, 13 Nov 2001 12:52:51 +0100 (CET) > > From: Attila Nagy <bra@fsn.hu> > > Subject: Re: ATA Hard Drives > > > > Hello, > > > > > What is the largest/fastest ATA drives currently supported by -STABLE? > > FreeBSD supports 48 bit addressing (introduced with ATA133 standard), so > > the limit is quite theoretical. > > BTW, the largest ATA drive I know of is the Maxtor 4G160J8 (160 GBs). > > Although this may be the largest it isn't the fastest, because it spins > > only with 5400 RPM. > >Just a comment on rotational speed. You should always check the >manfacturers specs as the design of the head can greatly affect the >speed of transfer to/from the platters. I have seen 5400 RPM >drives move data faster than 7200 RPM drives. You don't see it >often but RPM alone is not sole determining factor as much as >legend would make you think it is. > > >To Unsubscribe: send mail to majordomo@FreeBSD.org >with "unsubscribe freebsd-stable" in the body of the message Hm. I think it is more reasonable to say that density makes a big difference. Grab an old 2.0 gig 7200 rpm micropolis scsi that is not dead yet (those suckers died fast and hard), and plop in say a new 40 gig maxtor 5400 rpm drive, and I am sure the maxtor will be very close in performance. However, take any two modern drives, the one with higher rpms is almost always going to win. Because, at that point, density, seek times should be fairly close. -Carroll Kong To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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