In computing, Native Command Queuing (NCQ) is a technique supported by the Serial ATA protocol, which lets hard disk drives decide the sequence in which read and write commands are executed, thus reducing the amount of unnecessary drive head movement. Use of this resource results in less wear of the drive for workloads comprised of several simultaneous read/write requests. By using detailed knowledge of time to search for requests and rotation position, the drive can calculate a better order to perform the required operations. This results in a decrease in the amount of useless request retrievals in the drive head and better performance overall for reduced disk use.
