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SubjectRe: patch for sd.c: fix MB vs. GB
Date
> 
> Trick question; "Is this correct?"
>
> N / 1024 = kilobytes
> N / (1024 * 1024) = megabytes
> N / (1024 * 1024 * 1024) = gigabytes
>
> No dictionary I have available defines any of these. Even IEEE Software
> Engineering Standards (3rd Addition) doesn't define. The closest I
> found was kilobit (1000 bits). This is in Webster's New Collegiate
> Dictionary, 1996.
>
> So, what is the definitive reference that is irrefutable and defines these
> terms? This should be answered before we change anything. It just might
> be that a kilobyte, megabyte, and gigabyte should be in decimal terms like
> kilohertz, megahertz, and gigahertz -- and we've been wrong all along.
>
> Note that the usual "1.44MB" floppy is 1.40625 MB.
>
> 18 * 160 * 512 = 1,474,560
> / 1024 = 1,440
> / 1024 - 1.40625
>
> It looks to me as though the world has been dividing megabytes by 1,000
> to get gigabytes all along.
>

No, IBM has been using 1000*1000*1024 for *DISK* gigabytes for a long time,
but noone ever used other than 2 << 30 for memory. I say keep it sane
& keep it the same, and to h*** with marketing dept's.

-hpa

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