I've compared the performance of a single SSD with a RAID0 setup, comprised of two WD Caviar Black 640 drives, using the ICH10R chipset and Intel RST drivers 188.8.131.524.
Corsair Force F60 vs. 2 x WD Caviar Black (RAID0) / Everest Ultimate 5.50 banchmark: Average read access
The green line represents the average access time of Corsair Force F60, and the yellow line represents the average access time of the RAID0 volume created with two WD Caviar Black drives
Corsair Force F60 vs. 2 x WD Caviar Black (RAID0) / Everest Ultimate 5.50 banchmark: Read test suite
As you can see, the access time of a SSD is 66 times shorter than a 7200 RPM RAID 0 volume. This is the most important reason why SSD-equipped PCs operate much faster when loading files from the storage device. Everyone who already use a SSD knows that Windows loads much faster, it usually takes only 15-20 seconds, after the power on self test, to boot completely and load the desktop. Another example: usually, my Eclipse IDE installation (Eclipse PHP Development tools + Remote systems explorer) loads completely on about 30 seconds from a hard disk drive, and it takes only 7 seconds to load from a SSD. That's quite an improvement, IMO.
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