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#11
What I wonder is whether the externals get powered down? Maybe if you power cycled them instead of the PC? My E-SATA experience is with on-board controllers and mine has to be powered externally with a DC adapter. Also, I don't sleep my PC.
Hmm, did you check power management tab of the controller in device manager? See Step 6 - Power Options and Sleep Mode Problems. This may cause sleep problem so experiment and uncheck if sleep gets disrupted.