如何在Windows XP中禁用外部USB硬盘驱动器上的自动睡眠

I've seen a related question on this website regarding a Linux system. I have the same question on a Windows XP OS. I bought a Winchester USB external HD, and found out from technical support that the sleep feature is in the firmware and cannot be turned off. I'm looking for an application that will automatically read/write to that drive periodically to keep that timer resetting (every 5 minutes?). Is anyone aware of a small application for Windows XP that will do that?I've seen a related question on this website re