Serial ATA (SATA) is a computer bus technology primarily designed for transfer of data to and from a hard disk. SATA is a recent technological advancement of the standard IDE (ATA) hard drive interface. SATA employs a serial I/O communication bus instead of the parallel I/O bus used in ATA.

Serial ATA is a serial link a single cable with a minimum of four wires creates a point-to-point connection between devices. Transfer rates for SATA begin at 150 MBps.Compared with Parallel ATA, Serial ATA has lower signaling voltages and reduced pin count, is faster and more robust, and has a much smaller cable. Serial ATA is completely software compatible with Parallel ATA. Serial ATA technology allows for platform cost reductions and performance improvements while supporting a seamless transition from Parallel ATA technology. Configuration of Serial ATA storage devices is much simpler, with many of today's requirements for jumpers and settings no longer needed.

SATA II is the next set of SATA specifications after the initial SATA specification was written. SATA II specifications provide additional enhancements to SATA, delivered in increments.Features of SATA that increase performance levels include:Native Command Queuing (NCQ), RAID configurations with Serial ATA and Cyclic Redundancy Checking (CRC).Serial ATA will allow the performance of internal storage devices to continue to increase unabated for generations to come.

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