SATA III doubles the maximum data transfer rate for previous Serial ATA storage interface specifications from 3 to 6 Gigabits per second (6 Gb/s),
1.5 gb/s
It depends on the PATA drive in question. That said, the fastest UDMA interface when used with an 80-wire cable is 133 MB/s. From there, the maximum transfer rate for a SATA generation 1 drive is 150 MB/s. For SATA 2, it is 300 MB/s. For SATA 3, it is 600 MB/s.
3.0 GBPS
disk rotational speed in RPM
The main difference is transfer speed, if you for instance a new solid state drive it a sat 1 port it will be limited in speed, still fast but not the maximum performance you could get out of it, For a conventional Hard drive you won't notice the difference though. All sata devices are backward compatible so theres no worries there
less than the data transfer rate
E sata transfers at a rate of 300 megabytes per second and tapes transfer at a rate of up to 80 megabytes per second. E sata is by far the faster solution
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Data transfer rate (also called bandwidth)
less than the data transfer rate.
Transfer rate.
Data Transfer rate in modems is measured in Bits per second (Bps).