Re: RAID Sizes (was Re: Why do people in the UK put a u in the word color?)

[Andrei Popescu <andreimpopescu@gmail.com>]

On Sat, 15 Apr 2006 10:25:28 +0100
Wulfy <wulfmann@tiscali.co.uk> wrote:

> CaT wrote:
> > Because dividing by a multpile of 10 essentially simply moves the
> > decimal point to the left. The thing that's not bleedingly obvious
> > there though is that 156290816 is in kibibytes. :) So:
> >
> > 156290816 * 1024 / 1000 / 1000 / 1000 ~= 160.04 GB :)
> >
> > Similar for 468872448.
> If it's decimal, what's that "1024" doing there and why the odd number 
> "156290816" for a "Kibibyte"?  Surely they should ALL be powers of 10?
> 
> Seems a tad inconsistent to me...
> 
> Besides...  1024 is "decimal"...  2^10!!!  :þ
> 
> -- 
> Blessings
> 
> Wulfmann

binary, because you use powers of 2:

1 kiB = 2^10 = 1024 
1 MiB = 2^10 x 2^10 = 2^20 = 1048576
and so on

decimal, because you use powers of 10:

1 kB = 10^3 = 1000
1 MB = 10^3 x 10^3 = 1000000
and so on

HDD manufacturers advertise the decimal sizes of the unformated HDD,
because they are bigger ;)

Andrei
-- 
If you can't explain it simply, you don't understand it well enough.
(Albert Einstein)