On 30 Apr 2008, at 18:33, paul at clubi.ie wrote:
> On Wed, 30 Apr 2008, Rory Browne wrote:
>>>> 1000 terabytes. It is commonly abbreviated PB. When used with byte
>>> multiples, the prefix may indicate a power of either 1000 or
>>> 1024, so
>>> the exact number may be either:
>>>>>> * 1,000,000,000,000,000 bytes — 1000 ^ 5, or 10 ^ 15, or
>>> * 1,125,899,906,842,624 bytes — 1024 ^ 5, or 2 ^ 50.
>> Only scientists who can't count (called "computer scientists") use
> that latter definition.
>> To avoid ambiguity, IEC introduced seperate names for the 2^(n*10)
> prefixes, where typically the first two chars of the 2^(3n) prefix
> are prepended to "bi", e.g. Kilo -> Kibi, etc. The n==5 prefix is
> "Pebi".
Ah bless - he did his best, but a demon typo did for him. What Paul
meant to say (I trust) was:
To avoid ambiguity, IEC introduced seperate names for the 2^(n*10)
prefixes, where typically the first two chars of the 10^(3n) prefix
are prepended to "bi", e.g. Kilo -> Kibi, etc. The n==5 prefix is
"Pebi".
Niall
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