[Gllug] Bytes to Megabytes

[Julian Somers]

On Fri, Aug 26, 2005 at 03:33:48PM +0100, Liam Smit wrote:
> Hi
> 
> > Can anyone confirm for me a definition of a Megabyte that is correct for
> > measuring volumes of traffic?
> > 
> > I am doing a script that reports the number of Meagbytes transferred
> > during a VPN session. I collect data in bytes.
> > 
> > I have always used ( bytes / 1024 ) / 1024 to calculate file sizes in MB
> > (1MB = 1,048,576 bytes). But having read the three definitions of a
> > Megabyte here -- http://en.wikipedia.org/wiki/Megabyte -- I believe I
> > should be using 1MB = 1,000,000 bytes in this case.
> 
> Yup. I'm afraid this is what happen when marketing types pull a fast
> one and get away with it. But luckily this mostly apply to HDD's i.e.
> 1GB = 10^9 and not 2^30.
> 
> Although I see BT is carrying on as if 10^3 is a megabit...
> 
> Seeing as how it used to be 1024^2 I'd stick with that. Either way
> it's a 7% difference so maybe you should document whatever you decide
> on?
7% difference: how do you get that figure? I make it 4.8%.

thanks all,
Julian

(Apologies for starting a new thread with a reply to an exsisting one.)

> 
> 
> cheers
> Liam
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