The hybrid drive feature in Vista was ReadyDrive, not ReadyBoost. It never took off due to lack of driver support from manufacturers and/or Microsoft. Even so,

The hybrid drive feature in Vista was ReadyDrive, not ReadyBoost. It never took off due to lack of driver support from manufacturers and/or Microsoft. Even so, you're right that techically it's a cache because copies are stored on both physical drives backing the logical one. I just wanted to point out that ReadyBoost was about using additional drives to use as caches, while ReadyDrive was about using hybrid drives. http://en.wikipedia.org/wiki/ReadyDrive#ReadyDrive http://en.wikipedia.org/wiki/ReadyDrive#ReadyDrive http://msdn.microsoft.com/en-us/library/windows/hardware/gg463388.aspx http://msdn.microsoft.com/en-us/library/windows/hardware/gg4...