On Tue, 28 Jul 2009 14:29:56 -0500, Chase, John wrote:
>
>Indeed, the combined capacity of all the DASD ever manufactured is
>probably still too small to fully back even one 64-bit address space.
>2^64 is a really large number!

I doubt that's still true.

2^64 is about 8 billion GiB, or about 8 million terabytes.  With terabyte
drives readily available today and most PC's shipping hundreds of GiB, a lot
of DASD has been build.

Of course, if you are only counting mainframe DASD....

Tom Marchant

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