USB external HD does not turn off after system shut down

This is not a new issue in Leopard. I had this issue also in Tiger but I never bothered to ask whether there may be a solution to this issue.
I have firewire as well as USB HDs attached to my iMac. If I put my computer to sleep both the firewire and the USB HDs turn themselves off. The HDs come back to live after I reawake the Mac. But if I turn off the iMac then only the firewire HDs turn themselves off. The USB HDs remain turned on.
Is there a setting somewhere that can be changed so that the USB external HDs turn themselves off after system shut down?

Detlef Schmitt wrote:
This is not a new issue in Leopard. I had this issue also in Tiger but I never bothered to ask whether there may be a solution to this issue.
I have firewire as well as USB HDs attached to my iMac. If I put my computer to sleep both the firewire and the USB HDs turn themselves off. The HDs come back to live after I reawake the Mac. But if I turn off the iMac then only the firewire HDs turn themselves off. The USB HDs remain turned on.
Is there a setting somewhere that can be changed so that the USB external HDs turn themselves off after system shut down?
Since the issue is not a Leopard issue, and maybe not even a Tiger issue, you might check with the drive manufacturer for some assistance.
Does the drive turn off when you eject it and then pull out the USB plug? That's important.
Message was edited by: nerowolfe

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