I recently purchased 2 x HDD Western Digital Caviar Black EX, 640GB, 7200rpm, 64MB, SATA 3 (WD6402AAEX) and put them in RAID0.
I've installed Windows 7 x64
and HDD's connected with SATA III cable and enabled from BIOS (rest of the system is not important but for whom wants to know is: Motherboard
: Asus M4A89TD-PRO-USB3, Proc
: AMD Phenom II 1050T, RAM
:Corsair 2 x 2 Gb-DDR3-1600MHz CMX4GX3M2A1600C8).
I have installed all motherboard drivers
ofc after installing fresh Win 7 x64, and run the Windows Assesment Benchmark
Surprise: all components went up to 7.4 but HDD's only got 5.9 Scoring
Hmm, I ran the HD Tune Benchmark to see what's wrong with my HDD's. Nothing wrong with them, the benchmark results were these: Transfer rate
112.1 MB/sec, max:
203.2 MB/sec, Average:
166.6 MB/sec., Access Time
: 11.1 ms, Burst Rate
: 132.8 MB/sec.
I said ok. Let's change the HDD. I've took another HDD for comparison. Same company Western Digital WD3200AAKS 320 Gb. I've put is on SATA II full speed 3.0 Gb/sec normal SATA mode (not RAID). Reinstalled the above system, as well all drivers installed, then re-run the Windows Assesment Benchmark
Surprise again: all other components had the same 7.4 score, the new HDD WD3200AAKS again, same score: 5.9. I said, something must be wrong. I re-ran the HD Tune Benchmark to make sure these are accurate values, and I got: Transfer rate
43.2 MB/sec, max:
108.6 MB/sec, Average:
86.5 MB/sec., Access Time
: 15.5 ms, Burst Rate
: 136.7 MB/sec.
Normal values, almost half of the RAID0 configuration. Still, Windows sees both HDD configurations as having same scoring. Why is that?
Thanks in advance,