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.
disk rotational speed in RPM
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),
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
3.0 GBPS
The SATA III (Serial ATA III) interface supports a bit rate of 6 Gbps. This interface is commonly used for connecting hard drives and solid-state drives to a computer's motherboard. SATA III provides improved data transfer speeds compared to its predecessor, SATA II, which has a maximum bit rate of 3 Gbps.
no, sata drives transfer all of the data through the sata cable
Theoretical maximum throughput: SATA II: 3Gb per second. SATA III: 6Gb per second. The maximum uncoded transfer rates are 2.4 Gb per second and 4.8Gb per second, respectively.
1.5Gb/sec
3Gb/sec
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