[nzlug] Pictures of the first ever HDD

[Martin D Kealey]

> Michael Adams wrote:
> > http://news.com.com/2300-1015_3-6110361-1.html?tag=ne.gall.pg
> >
> > IBM RAMAC 50 X 24" (600mm) platters 5MB Capacity circa 1956
> >

On Fri, 19 Jan 2007, Cliff Pratt wrote:
> That seems wrong. The first commercial IBM disks had capacities rated in
> 100MB, and that was spread over a number of platters. That makes each platter
> hold up to 10MB per side (or less) and that implies an increase of density of
> only two times in approx 20 years!

That wasn't a 5MB platter - it was 5MB for the entire 50-platter drive, or
about 100 kB per platter.

-Martin