I just installed my new WD black Caviar 500gb 32mb cache HD on Windows 7 in achi mode.. And I'm having problems figuring out if I'm getting the right speeds I'm supposed to with it. (Sata II 3.0gb)
Now for some reason my Windows 7 is reporting that I am running in something called Multi-DMA mode 2...??? According to what I have researched is a really slow speed. However I ran some benchmarks and tests and heres some pics showing everything:
I just need to know if I'm getting the right speeds I'm supposed to because it just doesn't seem like it...
You have to understand that even though SATA-2 is rated at 3.0Gbit/sec (about 300MByte/sec), there are very, very few drives that can actually transfer data at anything close to that rate of speed. Some SSDs can get up above 200MByte/sec, but individual hard drives are closer to 100MByte/sec.
Interconnection standards like SATA are designed to last for several years - as such they need to be considerably faster than the fastest drives available when they are introduced so that they don't become instantly obsolete. This is why SATA-3 (600MByte/sec) is being introduced now - the fastest SSDs have just about reached SATA-2's capacity. There won't be any 600MByte/sec drives available for quite some time, so SATA-3 will be a viable connection standard for at least a few years.
Your transfer rates of over 90MByte/sec are pretty typical for a hard drive.
The maximum speed you will get from a device running in multi-word dma mode 2 is about 15 MB/s. Are you sure you're looking at the settings of the new drive?
As sminlal said, the test results from HD Tune are perfectly normal.