John, regardless if the PB was on or not, hard drives in general don't like 
being dropped.
Had the PB been powered and dropped, you probably would have damaged the head/s 
and plate/s (it can survive gentle acceleration of <<1 g, but a drop shock is 
hard acceleration >>1 g). As it wasn't powered, only the bearing/s or other 
mounting hardware may have seen the damage. It's hard to tell what was damaged 
until you take it apart and measure.
>From your description, I would guess that the bearings are starting to seize, 
>which mean that there is already damage of some sorts, and running it for any 
>length of time will make things go worse.

 -----Original Message-----
From:   John Perkins Jr. [mailto:[EMAIL PROTECTED] 
Sent:   Thursday, August 25, 2005 10:10 AM
To:     PowerBooks
Subject:        Re: Hard drive makes whining noise

It hesitated to spin up TWICE yesterday. Is it bad for it if I leave
the computer on all the time? And could that drop have damaged the
hard drive? The computer wasn't on at the time.


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