[G4] Case Vibration noise is my Problem.

[John Switlik]

Daniel -

I had a similar problem with a G4 450 Sawtooth. I added an IBM 45GB 
drive and the vibrations came and went just as you have observed. I 
have since replaced the original 20GB Quantum drive with another IBM 
(80GHB) and I haven't had this problem since. I can't say for sure, but 
I believe the vibration may have had something to do with a mechanical 
resonance between the two drives spinning at the same speed but 
slightly out of phase.

You may try and reseat the drive carrier assembly and make sure the 
screws that attach the drives to the carrier are tightened (as well as 
the single screw that secures the carrier to the case.

Let me know what you find/John

On Saturday, Dec 21, 2002, at 10:17 US/Pacific, Daniel Brieck wrote:

> The fan noise is not my problem the system fans are not that loud on 
> my G4 Sawtooth single processor. The occasional case vibration however 
> is a disappointment. This machine has been doing this since I have 
> added a second hard drive. Does the newer g4 suffer the same problem 
> as mine. I have two 7200 rpm hard drives in the case and that seems to 
> vibrate the door on the case. Gets  a little loud and there is nothing 
> I can do about it other than open and re-close the case or pick up the 
> front of it. The noise stops periodically but it always comes back. 
> Does the newer machines have the same kind of problems with multiple 
> drives. It would not be easy on the ears for me if i put in another 2 
> hard drives...
>
> Dan Brieck Jr.