Windows 7: Winsat disk.

No need to down load anything.
Just run winsat disk from command prompt. I really don't know how to read the out put and compare. I could use a little explanation.
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C:\Windows\system32>winsat disk
Windows System Assessment Tool
> Running: Feature Enumeration ''
> Run Time 00:00:00.00
> Running: Storage Assessment '-seq -read -n 0'
> Run Time 00:00:02.96
> Running: Storage Assessment '-ran -read -n 0'
> Run Time 00:00:00.28
> Running: Storage Assessment '-scen 2009 -drive C:'
> Run Time 00:00:52.79
> Running: Storage Assessment '-seq -write -drive C:'
> Run Time 00:00:03.82
> Running: Storage Assessment '-flush -drive C: -seq'
> Run Time 00:00:00.92
> Running: Storage Assessment '-flush -drive C: -ran'
> Run Time 00:00:00.98
> Running: Storage Assessment '-hybrid -ran -read -n 0 -ransize 4096'
NV Cache not present.
> Run Time 00:00:00.01
> Running: Storage Assessment '-hybrid -ran -read -n 0 -ransize 16384'
NV Cache not present.
> Run Time 00:00:00.00
> Disk Sequential 64.0 Read 258.17 MB/s 7.5
> Disk Random 16.0 Read 169.07 MB/s 7.6
> Responsiveness: Average IO Rate 0.75 ms/IO 7.9
> Responsiveness: Grouped IOs 8.00 units 7.5
> Responsiveness: Long IOs 2.26 units 7.9
> Responsiveness: Overall 18.09 units 7.8
> Responsiveness: PenaltyFactor 0.0
> Disk Sequential 64.0 Write 213.95 MB/s 7.4
> Average Read Time with Sequential Writes 0.532 ms 7.9
> Latency: 95th Percentile 1.728 ms 7.8
> Latency: Maximum 9.470 ms 7.9
> Average Read Time with Random Writes 0.596 ms 7.9
> Total Run Time 00:01:02.29

C:\Windows\system32>