David Drummond wrote in a message to MIKE ROSS:

 KP>> From my experience and all of the books I have read the only angle
 KP>> that your never supposed to run a Hard Drive is upside down. It 
 KP>> sounds like his was already mounted on it's side and when he tilted it 
 KP>> an aditional 45 degrees that put his drive upside down.
 KP>> You are almost guarenteed to kill a drive this way.

 DD>> I disagree. Some of the PCs we have at work have the drive mounted
 DD>> circuit side up.

 MR> I am surprised because upside down is the most common interdiction in
 MR> manufacturer's warnings. These usually read mounting on either side 
 MR> is ok except upside down. Do you know why upside down is warned against?

 DD> I have never seen any manufacturer state that.

I have.  But not lately.  It was a pretty common warning on a lot of
earlier drives,  I suspect because of the design of the spindle bearings.

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