On Thu, 12 Jul 2007 14:34:17 -0400, J R wrote:

>Well, I was always aware of the trade-offs, i.e. bit density
>at the center v. bit density at the outside, but I wasn't
>aware that anything was ever done about it with variable
>data rates, etc.

It's not such a big deal with SLED, where the recording surface is a couple of 
inches on the outside of a 14 inch disk.  It makes a bigger difference on 3.5 
inch platters.

-- 
Tom Marchant

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