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If an organization collects an average of $20,000$ EPS over eight hours of an ongoing incident, that will require sorting and analysis of $576,000,000$ data records. Using a $300$ byte average size, that amounts to $172.8$ gigabytes of data.

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I'm not clear how this $172.8$ was calculated. I know 576,000,000 was taken by multiplying 8 hours into seconds. Should i divide the $300$ byte average size? Please help.

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$$576000000\cdot300=172800000000=172.8\cdot10^9\;.$$

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    but thats bytes not GB? which is 160.933 GB. not 172.82012-11-08
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    A [gigabyte](http://en.wikipedia.org/wiki/Gigabyte) is usually defined as $10^9$ bytes, though an alternative definition as $2^{30}$ bytes is also in use.2012-11-08
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    if i do a google convert using convert 172800000000 to GB it gives me 160.2012-11-08
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    If your concern is with different definitions of a gigabyte, you should ask about that, and this wouldn't be the appropriate forum. Here you asked about how the number 172.8 was calculated, and I answered that question.2012-11-08
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    oh i got it google is using 2^30 not 10^9. I got it:) thanks:)2012-11-08