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What is SATA ( Serial ATA )?

Serial ATA is the latest standard in IDE(Atapi) devices.
The maximum speed of Serial ATA is 150MB/s ( the maximum speed of Parallel ATA is 133MB/s, the ATA133 standard ).
The cable for Serial ATA has a minimum of 4 wires ( extra ground wires can be applied ), a 7-pin connector and a maximum length of 1 metre ( about 3.1 feet ).
Because of the serial protocol only 1 device can be connected to each cable.
The big advantages compared to Parallel ATA are higher speeds ( speed will increase in the future ), longer cables and better airflow in your case because of the smaller footprint of the cables.

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