I have upgraded the firmware in my DNS-325 to v1.03, and installed all the apps, and I noticed that my drives were not hibernating, as they had in v1.02.
After checking these D-Link forums, I disabled the myDlink Cloud service, verified oplocks were disabled, I don't use iTunes, but verified that it was disabled as well.
I wanted to report that the drives are now hibernating fine on schedule, with firmware v1.03.