Good information for the computer world, but not necessarily so for the telephone world. Some company's drives can't be ghosted or copied from the original drive, they use a proprietary formating. A good geek could probably break it but at a time consuming cost. ESI comes to mind first, not sure about Comdial. I'm far from an expert in hard drives or computers, but using the manufacturer's replacement parts has been quick and efficient from a business standpoint.
A person can waste a lot of time trying to save a few bucks. It's like triping over a dollar to pick up a dime.

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