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Date:      Sat, 13 Apr 96 15:25:41 PST
From:      "Brett Glass" <Brett_Glass@ccgate.infoworld.com>
To:        Michael Smith <msmith@atrad.adelaide.edu.au>
Cc:        msmith@atrad.adelaide.edu.au, jacs@gnome.co.uk, hardware@FreeBSD.ORG
Subject:   Re: Micropolis  1991 AV 9GB Drive
Message-ID:  <9603138294.AA829427555@ccgate.infoworld.com>

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> "Average access times" are a bit of a furphy.  Look at the 'full stroke'
> timings for starters.

"Full stroke" timings don't take cylinder capacity into account, and are
therefore not as good a metric.

> J. Random Tower's PSU will have most of it's balls behind the 5V rail.

Ratings are readily available, and show that most supplies are capable of
supplying the SPIN-UP current of the latest disks (far more than is needed
during actual use) continuously. Older disks might be a problem, but we're
talking about today's technology.

> It sounds like you're looking at them in the context of Multimedia
> applications, and under those circumstances these issues aren't so
> significant.  For all the bulk data throughput, MM apps don't actually
> work the disk very hard.

Just try playing back several movies at the same time and listen to the
thrashing!

--Brett




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