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NCQ

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NCQ

(Native Command Queuing) A feature of the SATA technology that reduces the number of read/write head movements in a hard disk. NCQ queues up read/write commands and executes them in the most efficient order.

Also for Solid State Drives (SSDs)
Command queuing is also used for SSDs because read and write instructions from the CPU can accumulate faster than even an SSD can handle them. The newer NVMe controller interface designed for SSDs increased the command queue an order of magnitude. While the common SATA/AHCI interface holds only 32 commands in one queue, NVMe supports 64K commands in 64K queues. See AHCI and NVMe.
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References in periodicals archive
1.0, ATA-7 - Native Command Queuing - DIPM and HIPM Fully Supported - Staggered Spin Up & Active LED Supported - Hot Plug -- Best in Class Read / Write Power Consumption: 1.6W typ.
FUJITSU UNVEILS HDD FOR AUDIO RECORDING/DVR FUNCTIONALITY
The subsystems take advantage of SATA II technology enhancements, such as 3-Gbps transfer rates, native command queuing for transaction-oriented applications and hot plug capability.
SATA RAID enclosures
The server offers 14 HDD bays with up to 300Mb/s throughput, support for Native Command Queuing, connection to a Serial-ATA II RAID controller and two additional HDDs assigned to hosting the Windows Storage Server 2003 R2 OS.
Evesham Technology unveils SilverSTOR 3142 NAS storage server
The SATA 2.5 specification was recently released and with new features such as Native Command Queuing, 3Gb/s transfer rates, Port Multiplication, and Port Selection, SATA RAID holds great promise for the enterprise.
Is SATA ready for the enterprise?
The industry's first 3Gb/s SATA host controller supporting PCI-Express, the SiI 3132 offers full advanced SATA functionality normally limited to server-class systems, including 3 Gb/s SATA data transfer rates, Native Command Queuing, support for port multipliers with Frame Information Structure (FIS)-based switching and support for ATAPI commands, making it compatible with optical drives such as CD-ROMs and DVD+/-RWs.
PCI-EXPRESS SIL 3132 COMPATIBILE WITH OPTICAL DRIVES
Providing a half terabyte of capacity for data-intensive applications such as graphic design, digital video editing, personal video recorders and advanced business computing, WD Caviar SE16 500 GB drives also deliver high 7,200 RPM performance with 300 MB/s transfer rate, 16 MB cache and Native Command Queuing (NCQ).
WD INTRODUCES HALF-TERABYTE SERIAL ATA DESKTOP HARD DRIVES
What do a high-rise elevator and disc drive technology Serial ATA Native Command Queuing (NCQ) have in common?
Supercharging SATA drive performance: Native Command Queuing makes SATA viable in workstation, server applications
The SS1200 and SS1300 include support for 3G SATA I/O and Native Command Queuing (NCQ) and are completely backward compatible with 1.5G SATA I/O.
SILICONSTOR UNVEILS SS1300 ACTIVE-ACTIVE MULTIPLEXER DEVICE
Some of the other key enhanced SATA features were published by the SATA II working group in several specifications and included Native Command Queuing (NCQ), Port Multiplier, Staggered Spin Up, Port Selector, External SATA, and Hot Plug.
What is SATA II? How is it different from SATA "one"? Should I care if my system supports SATA II?
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