I have a 2.5" drive, 7200RPM and eSATA 3 (6gbps) drive.

If I put it in an enclosure that is eSATA 2 (3gbps),

how much impact does it have on the drive's performance

using the various i/o throughput benchmarking apps,

compared with if the enclosure supported 6gbps?

(assume that that controller in the computer is indeed

a 6gps esata3 controller).