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(example: my School PC is the slower computer (we are formatting my HDD on there)

i go home and put that Formatted HDD into my faster computer) my teacher said that it will effect how my OS runs since it was installed on a slower computer. Is that true?

--- Improved answer by gbaughma ---

Well, first of all, if you install an OS on a hard drive, then pull that hard drive out and put it in another computer, it probably will not boot and run properly.

Part of the OS installation (on today's operating systems) is determining what hardware is installed and installing the drivers for that hardware. Pulling the hard drive out and putting it in another computer would confuse the OS, and it would probably blue-screen on you.

Meanwhile... just formatting a hard drive on one computer and moving it to another computer will not effect the speed of the new computer.

** Caveat to this statement ***

On older systems, where interleave was calculated when formatting the hard drives, taking that drive out and putting it in a computer that could handle a smaller interleave would cause a performance issue. However, that is not the case any more, since IDE (Internal Drive Electronics) and SATA drives handle all of that onboard now, and it's not handled by the computer and external hard drive controller any more.

Anyway... long story short... your teacher is incorrect. Formatting a hard drive on a "slower" computer and putting that hard drive in a faster computer will not affect the performance.

--gbaughma

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