FireWire drive unmounting/disapering when computer returns from sleep

I have a problem since the latest software update 10.4.10
that my WD 500GB FW800 drive keeps unmounting/disapearing after
the computer returns from sleep, and subsequently issuing a unclean unmount message!
Toggling the drive power restores it and so far no data is lost... I hope..

Well, yesterday I decided to do some troubleshooting to confirm the source of the problem. I connected a different external hard drive using the same USB2 cable that I was using with the problematic WD Mybook. I performed flawlessly and showed no issues with not being accessable after the computer woke from sleep. Next I connected the same drive via Firewire 400. Also no issues. That seemed to confirm that there was a problem with the WD drive! However, just to be sure, I reconected the WD Mybook with the original USB cable and gave it another whirl. It has also been performing flawlessly for the past day!
Possibilities:
1 There was minor oxidation on the contacts of the cable or in the drive socket which gave a poor connection resulting in the problem. Removing and replacing the cable several times removed the oxide and restored proper electrical contact and drive operation.
2 Something in the WD Mybook firmware "reset" when it was unpowered for a few hours, also restoring proper operation. WD's website states that the Mybooks are able to remain in standby mode for long periods of time but that they recommend they be powered down when not in use.
It would be interesting to see if anyone else can confirm that their Mybooks begin to operate properly after "giving them an unpowered rest" or by cleaning the USB connections.
I know how to keep my Mybook operational for now, but I will likely have to ditch it when I move to a multi FW bus computer in the future (unless WD can correct their firmware).
Cheers

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No answer till now. Better close it.

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No answer till now. Better close it.

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FireWire drive unmounting/disapering when computer returns from sleep

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