I've heard these referred to as "marketing megabytes/gigabytes".  I.e., the
sales people use 1000, because it makes their products look bigger.

At 12:05 PM 1/10/2003 -0500, Richard Sims wrote:

>can anyone tell me how TSM calculate 1MB? Is it 1000KB or 1024KB.

Good question.
We'll take Andy's answer as definitive.
Curiously, the TSM manuals say nothing about it.  I've submitted a
request to Publications to have this added.
Note that the issue is somewhat muddied by disk makers basing their
sizings on 1000, whereas software uses 1024.

  Richard Sims, BU

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