Found it! The MS1000-HS2 is NOT SATA3 compatible![]()
As mentioned, I am using only one drive, the WS1002FAEX which was installed in one of the removable drive bays. Installation of W7 when connected to the SATA2 port was no problem, all worked well. Installation of W7 when connected to the SATA3 port randomly resulted in unresponsiveness during W7 installation.
To test if the issues are caused by the removable bay, I removed the hard disk from the removable drive bay and connected the drive directly to the SATA3 port on the motherboard. The system directly booted from Windows7! I then re-installed the drive back into the removable drive bay, restarted the system and the initial issue showed up again!
To make sure the removable drive bay is causing the problems when connected to the SATA3 port, I did the same test again and again the same results. In other words, the MS1000-HS2 is not SATA3 compatible.
A quick comparison test by means of HD Tune 4.01 showed some improvement on access time (12.7 -> 12.3ms) and improvement on Burst rate (158MB/s -> 192MB/s).
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