WWYD: replacing sick Mac Pro

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ka jowct wrote:
... I just hooked up the drive that I was using when this all started, and it is screwed up on my laptop, too. It won't boot, except to the recovery partition, and two volumes are locked, with no apparent way to unlock them or even view the contents.

Same admin user on every system.

Maybe it is not the hardware after all. Maybe it is software.
get a NEW drive and install OS X from DVD on that drive. Does it work?