Using a 9- to 4-pin adapter / firewire noise

Whenever I record an instrument with a pickup, I get a wind-up sound every few minutes; a high-pitched whine that I can only assume is from one of my hard drives. I know that the sound isn't coming from being in close proximity to the internal HD.
I heard from a friend that it may be possible to eliminate this noise by using a 4-pin firewire connector (since it doesn't carry voltage, only data). This is assuming, of course, that the motor-sound is coming through the voltage-carrying wires in the cable.
All of my drives are powered by their own adapters, not by the f/w buss.
Anybody know anything about this?

Jon H. wrote:
Whenever I record an instrument with a pickup, I get a wind-up sound every few minutes; a high-pitched whine that I can only assume is from one of my hard drives. I know that the sound isn't coming from being in close proximity to the internal HD.
I heard from a friend that it may be possible to eliminate this noise by using a 4-pin firewire connector (since it doesn't carry voltage, only data). This is assuming, of course, that the motor-sound is coming through the voltage-carrying wires in the cable.
All of my drives are powered by their own adapters, not by the f/w buss.
Anybody know anything about this?
There are some drives out there that have their chassis ground connected to the FireWire cable ground.
You have one of these drives.
You need to replace with another hard drive that does not do this.
Cheers

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