HP Xw8200 Intel Integrated SATA RAID: Intel Application Accelerator User's Man - Page 21

Advanced Host Controller, Interface / Native Command, Queuing

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Advanced Host Controller Interface / Native Command Queuing R 7 Advanced Host Controller Interface / Native Command Queuing Advanced Host Controller Interface Advanced Host Controller Interface (AHCI) is an interface specification that allows the storage driver to enable advanced Serial ATA features such as Native Command Queuing and Native Hot Plug. Note: AHCI is built into the Intel® 915 and Intel® 925 Express Chipsets that use the Intel® 82801FR I/O Controller Hub (ICH6R) and requires Intel® Application Accelerator version 4.0 or later. Native Command Queuing Native Command Queuing (NCQ) is a feature supported by AHCI, It allows Serial ATA hard drives to accept more than one command at a time. NCQ, when used in conjunction with a hard drive that supports NCQ, increases storage performance on random workloads by allowing the drive to internally optimize the order of commands. Note: In order to take advantage of NCQ, you need: Intel 915 or Intel 925 Express Chipset with the ICH6R, Intel Application Accelerator version 4.0 or later, and a hard drive which supports NCQ. Native Hot Plug Native hot plug is a feature supported by AHCI, allowing Serial ATA hard drive removal or insertion while the system is powered on and running. For example, this may be used when replacing a failed hard drive that is in an externally-accessible drive enclosure. Note: In order to take advantage of native hot plug, you need the following: x Intel 915 or Intel 925 Express Chipset using ICH6R x Intel Application Accelerator version 4.0 or later x A hard drive which supports hot plug. User's Manual 21

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Advanced Host Controller Interface / Native Command Queuing
R
7
Advanced Host Controller
Interface / Native Command
Queuing
Advanced Host Controller Interface
Advanced Host Controller Interface (AHCI) is an interface specification that allows the storage
driver to enable advanced Serial ATA features such as Native Command Queuing and Native Hot
Plug.
Note:
AHCI is built into the Intel® 915 and Intel® 925 Express Chipsets that use the Intel® 82801FR
I/O Controller Hub (ICH6R) and requires Intel® Application Accelerator version 4.0 or later.
Native Command Queuing
Native Command Queuing (NCQ) is a feature supported by AHCI, It allows Serial ATA hard
drives to accept more than one command at a time. NCQ, when used in conjunction with a hard
drive that supports NCQ, increases storage performance on random workloads by allowing the
drive to internally optimize the order of commands.
Note:
In order to take advantage of NCQ, you need: Intel 915 or Intel 925 Express Chipset with the
ICH6R, Intel Application Accelerator version 4.0 or later, and a hard drive which supports NCQ.
Native Hot Plug
Native hot plug is a feature supported by AHCI, allowing Serial ATA hard drive removal or
insertion while the system is powered on and running. For example, this may be used when
replacing a failed hard drive that is in an externally-accessible drive enclosure.
Note:
In order to take advantage of native hot plug, you need the following:
Intel 915 or Intel 925 Express Chipset using ICH6R
Intel Application Accelerator version 4.0 or later
A hard drive which supports hot plug.
User's Manual
21