Date: Wed, 14 Nov 2001 23:07:08 +0100 From: "Steve O'Hara-Smith" <steve@sohara.org> To: bv@wjv.com Cc: damascus@home.com, stable@FreeBSD.ORG Subject: Re: ATA hard drives Message-ID: <20011114230708.3ceb579d.steve@sohara.org> In-Reply-To: <20011114095048.A14300@wjv.com> References: <bulk.37366.20011114002208@hub.freebsd.org> <bulk.37366.20011114002208@hub.freebsd.org> <20011114051132.A12369@wjv.com> <5.1.0.14.2.20011114091338.03464ec0@netmail.home.com> <20011114095048.A14300@wjv.com>
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On Wed, 14 Nov 2001 09:50:48 -0500
Bill Vermillion <bv@wjv.com> wrote:
> Not neccesarily true. About 3-4 years ago I was researching drives
> and found the IBM 5400RPM SCSI drives were faster than the SEAGATE
> Baracudda 7200RPM drives. This was because the IBM's were using a
> new head design. Improved media can also mean that you can write
So the IBMs had a higher capacity or fewer platters at higher
density. Head design alone doesn't help unless it translates to more
bits per inch of track or more tracks per inch or both.
It seems likely that the 160Gb Maxtor 5400 RPM could have a
faster data rate than a 7200 RPM 80Gb unless the Maxtor has rather
more platters than the typical 7200 RPM 80Gb. Disc performance is
a complex thing depending on rotational speed, linear bit density,
track density, head movement speed, head settling time, soft error
rate, pattern of use and probably a few other things.
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