🚀 go-pugleaf

I had the infamous Quantum/Apple startup problems with my IIcx & 80 Meg
drive, and had already had the drive replaced twice and the logic board
replaced once.  Hence I was very happy to hear that an "official" solution
to the problem was announced.  I took my machine in and now have the new ROM
(or PROM or whatever it is).  So far I have had no startup problems, but I
now have a NEW problem - Noises coming from the drive when it is NOT
accessing.  

Causing the disk to access always causes a quiet grinding sound (this is
normal, I suppose) but now the sound will sometimes continue to sound
continuously after an access.  For example, if I just play around in the
finder opening folders, sooner or later I will open a folder and have the
grinding sound continue (but the light does not continue to flash).  No
matter how long I wait it'll just keep grinding away.  If I keep opening
folders, the sound will generally stop at one of the subsequent accesses.
Another way I've been able to toggle the noise on and off is by opening the
control panel and switching amongst the CDEVs.  Stranger still, some of the
CDEVs seem more likely to cause the grinding to start (TappyType gets the
grinding going most of the time).

During normal work various things seem to be capable of causing the noise to
start or stop.  

Does anyone know what's going on?  Is it related to the "upgrade"?

Any and all responses will be appreciated.

Thanks!   -Lee (spector@cs.umd.edu)