Intel Matrix Storage Manager User's Manual

Glossary
R
Appendix B Glossary
AHCI Advanced Host Controller Interface: an interface specification that allows the
storage driver to enable advanced Serial ATA features such as Native
Command Queuing, native hot plug, and power management.
Intel® Matrix Storage
Manager Option ROM
The option ROM is a code module built into the system BIOS that provides
boot support for RAID volumes as well as a user interface for configuring and
managing RAID volumes.
Matrix RAID Two independent RAID volumes within a single RAID array.
Member A hard drive used within a RAID array.
Migration The process of converting a system's data storage configuration from a non-
RAID configuration (pass-thru) to a RAID configuration.
Hot Plug The unannounced removal and insertion of a Serial ATA hard drive while the
system is powered on.
NCQ A command protocol in Serial ATA that allows multiple commands to be
outstanding within a hard drive at the same time. The commands are
dynamically reordered to increase hard drive performance.
Port0 Serial ATA port (connector) on a motherboard identified as Port0
Port1 Serial ATA port (connector) on a motherboard identified as Port1
Port2 Serial ATA port (connector) on a motherboard identified as Port2
Port3 Serial ATA port (connector) on a motherboard identified as Port3
POST Power-On Self Test
RAID Redundant Array of Independent Drives: RAID allows data to be distributed
across multiple hard drives to provide data redundancy or to enhance data
storage performance.
RAID 0 (striping) The data in the RAID volume is striped across the array's members. Striping
divides data into units and distributes those units across the members without
creating data redundancy, but improving read/write performance.
RAID 1 (mirroring) The data in the RAID volume is mirrored across the RAID array's members.
Mirroring is the term used to describe the key feature of RAID 1, which writes
duplicate data to each member; therefore, creating data redundancy and
increasing fault tolerance.
RAID 5 (striping with parity) The data in the RAID volume and parity are striped across the array's
members. Parity information is written with the data in a rotating sequence
across the members of the array. This RAID level is a preferred configuration
for efficiency, fault-tolerance, and performance.
RAID 10 (striping and
mirroring)
The RAID level where information is striped across a two disk array for system
performance. Each of the drives in the array has a mirror for fault tolerance.
RAID 10 provides the performance benefits of RAID 0 and the redundancy of
RAID 1. However, it requires four hard drives.
RAID Array A logical grouping of physical hard drives.
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