chiliGREEN Home Server: Intel Rapid Storage Technology - Manual (Page 12)

2.9 Intel® Rapid Recover Technology
Intel® Rapid Recover Technology utilizes RAID 1 (mirroring) functionality to copy data from a designated
master drive to a designated recovery drive. The master drive data can be copied to the recovery drive
either continuously or on request.
When using the continuous update policy, changes made to the data on the master drive while the system
is not docked are automatically copied to the recovery drive when the system is re-docked. When using
the on request update policy, the master drive data can be restored to a previous state by copying the
data on the recovery drive back to the master drive.
The following table provides an overview of the advantages, the disadvantages and the typical usage of
Intel® Rapid Recover Technology.
Recovery Volume Overview:
Hard Drives Required: 2
Advantage: More control over how data is copied between master and recovery
drives; fast volume updates (only changes to the master drive since the
last update are copied to the recovery drive); member hard drive data
can be viewed in Microsoft Windows Explorer*.
Disadvantage: No increase in volume capacity.
Application: Critical data protection for mobile systems; fast restoration of the
master drive to a previous or default state.
2.10 Advanced Host Controller Interface
Advanced Host Controller Interface (AHCI) is an interface specification that allows the storage driver to enable
advanced SATA features such as Native Command Queuing and Native Hot Plug.
Refer to Supported Chipsets for AHCI for more information.
2.10.1 Native Command Queuing
Native Command Queuing (NCQ) is a feature supported by AHCI that allows SATA hard drives to accept more
than one command at a time. NCQ, when used in conjunction with one or more hard drives that support NCQ,
increases storage performance on random workloads by allowing the drive to internally optimize the order of
commands.
Note: To take advantage of NCQ, you need the following:
• Chipset that supports AHCI
• Intel® Rapid Storage Technology
• One or more SATA hard drives that support NCQ