"Jeff Liebermann" wrote in message
...

I've come to the anecdotal conclusion that it's not how many hours
you run the drive, but how many times you turn it on and off.

This seems to be the consensus. My previous computer was rarely turned off,
and ran 11 years with no problems.

With my current machine, I switch it to Sleep most nights, so the drives are
not being shut down more than about 300 times a year.