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    When multiple read and write commands are sent to the SATA drive, NCQ steps in to optimize the completion of these commands by grouping the commands in order of processing efficiency, thereby reducing the mechanical workload and increase performance from the drive.
    In SATA 1, the drive head rotates three times to perform a task, taking a longer path. On the other hand, in NCQ implemented SATA 2 and 3, the drive head rotates just two times, taking a shorter route for the completion of the same task.
    In conclusion, the SATA II Native Command Queuing adds data-handling intelligence that will deliver the performance needed for the next generation of entry-level server, networked storage and high-end PC markets. The following are additional documents that are referenced in this white paper.
    This section provides an example of how a Read FPDMA Queued command would be implemented with SATA II Native Command Queuing. The host driver must perform a few steps to initialize the host controller for queuing operation and ensure that the drive supports Serial ATA II Native Command Queuing.
    Since late 2004, most new SATA drive families have supported NCQ. The following Seagate model numbers drive families support NCQ: Frequently asked questions for Serial-Attached SCSI drives, including information on performance, specifications, and model families.
    Serial ATA II Native Command Queuing provides an efficient and streamlined data transfer and status return mechanism. The increased performance and efficiency is achieved through features of the SATA II Native Command Queuing protocol that include race-free status return mechanism, interrupt aggregation, and First Party DMA.
  2. SATA Vs SATA 2 Vs SATA 3 - What's The Difference?

  3. WebSep 24, 2003 · Native Command Queuing (NCQ) is a technology designed to improve performance and reliability as the transactional workload increases on SATA hard disk drives.

    Missing:

    • WIKI

    Must include:

  4. NCQ and TCQ on WD SATA Drives - WD Support