You only need to ask the same question once and not in different sections of the Q & A forum.
Technically the answer is no but there is a caveat applied here. The Windows 2003 Power Saving Mode is very good at shutting down things but not so good at starting them up again so you could very well have a situation where it will work sometimes and not at other times and you'll need to reboot the unit to get the drives running again.
If you want to increase the life if the drives make sure that they remain cool and are not allowed to get really hot so you'll need to organize a decent amount of air flow over them to keep them cool and while it will not save any electricity and will even cost you slightly more to actually run, the drives will last much longer and you'll not be in a position of having down time caused because the HDD's will not restart costing far more money that what is saved.
Col