If you look carefully at the Website of Hard Drive Manufacturers and PC Makers, you will see that they usually have an *Asterisk next to their Hard DIsk Sizes (and sometimes RAM as well)

They will usually say something akin to 500Gb = 500 Billion Bytes........i.e. akin to saying that the steps between Kb and Mb are in Dividing by 1,000

However, PC's are obviously Binary Devices.......and steps that a PC OS will take to go from Bytes to Kilobytes will be to divide the number of Bytes by 2^10 = 1,024........and similarly with the step from Kb to Mb......and likewise from Mb to Gb etc., etc.

So if the Drive in the MC200 has 500Gb or 500 Billion Bytes.......can vary slightly from Drive Manufacturer to Manufacturer.........then you calculate the actual Drive Space as follows

500 Gb
----> 500,000,000,000 Bytes
----> 488,281,250 Kb
----> 476,837 Mb
----> 466 Gb

It is the above apparent "loss" that many people refer to when they talk about the "Formatted" versus "Unformatted" Size of a Hard Drive

All PC OS's have used the above 1024 Divisor.........until Mac OS changed recently on either Snow Leopard 10.6 or Lion 10.7 (can't remember which)......now the Finder on Mac's use a Divisor of 1000, just to match in with what people expect.........many Mac Apps will fall into line with that, but some still don't

All WIndows OS still use the 1024 Divisor to show Free Space etc.........I've always meant to check if they've changed on WIn 7, but maybe someone here knows

I'm pretty sure that Linux still uses the 1024 Divisor.......and that's important as Linux is the OS for the MC200, MC600, MD600, TwinStore etc.

So ControlPC, ControlMac and the Debug could actually report Different amounts of Free Hard Disk Space, even though the actual Free Space in Bytes will actually be identical

Hope that BS helps smile

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