Hello, I have a Samsung 840 EVO 120GB SSD and WD Caviar Black 1TB HDD. The problem is that when I want to defragment (optimize) or analyze the HDD (WD Caviar Black 1 TB) in native Windows 8.1 defrag tool, it goes from 0% to 100% in about 1 second and says the disk has been optimized. But it did not even do anything with the disk, HDD led did not even lit up or flash. It is like the tool skips the defragmentation and says it was done nevertheless. Even Event viewer says it was done successfuly. What could be the problem?