HP EliteBook 8460p RAID - Windows 7 - Page 6

RAID technology overview, RAID terminology, select HP Business Notebook PCs.

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2 RAID technology overview This chapter defines the terms used in this guide and describes the RAID technologies supported by select HP Business Notebook PCs. RAID terminology Some of the terms in the following table have a broader meaning, but they are defined in relation to the RAID implementation described in this guide. Term Fault tolerance HDD Option ROM Primary drive RAID array RAID migration RAID volume Recovery drive Reliability Stripe Striping Definition The ability of the computer to continue to operate if one drive fails. Fault tolerance is often used interchangeably with reliability, but the two terms are different. One physical Hard Disk Drive in the RAID array. A software module inside the system BIOS that provides extended support for a particular piece of hardware. The RAID option ROM provides boot support for RAID volumes as well as a user interface for managing and configuring the systems RAID volumes. The main internal HDD in the notebook PC. The physical drives that appear as one logical drive to the operating system. The change of data from a non-RAID to RAID configuration. "RAID level migration," or the change of data from one RAID level to another, is not supported. A fixed amount of space across a RAID array that appears as a single HDD to the operating system. The hard drive that is the designated mirror (copy of the primary) drive in a RAID 1 and IRRT volume. Reliability refers to the likelihood-over a period of time-that a HDD can be expected to operate without failure, also known as mean time before failure (MTBF). Set of data on a single hard drive in a RAID volume. Striping is the distribution of data over multiple disk drives to improve read/write performance. 2 Chapter 2 RAID technology overview

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2
RAID technology overview
This chapter defines the terms used in this guide and describes the RAID technologies supported by
select HP Business Notebook PCs.
RAID terminology
Some of the terms in the following table have a broader meaning, but they are defined in relation to the
RAID implementation described in this guide.
Term
Definition
Fault tolerance
The ability of the computer to continue to operate if one drive fails. Fault tolerance is often
used interchangeably with reliability, but the two terms are different.
HDD
One physical Hard Disk Drive in the RAID array.
Option ROM
A software module inside the system BIOS that provides extended support for a particular
piece of hardware. The RAID option ROM provides boot support for RAID volumes as well
as a user interface for managing and configuring the systems RAID volumes.
Primary drive
The main internal HDD in the notebook PC.
RAID array
The physical drives that appear as one logical drive to the operating system.
RAID migration
The change of data from a non-RAID to RAID configuration. “RAID level migration,” or the
change of data from one RAID level to another, is not supported.
RAID volume
A fixed amount of space across a RAID array that appears as a single HDD to the operating
system.
Recovery drive
The hard drive that is the designated mirror (copy of the primary) drive in a RAID 1 and
IRRT volume.
Reliability
Reliability refers to the likelihood—over a period of time—that a HDD can be expected to
operate without failure, also known as mean time before failure (MTBF).
Stripe
Set of data on a single hard drive in a RAID volume.
Striping
Striping is the distribution of data over multiple disk drives to improve read/write
performance.
2
Chapter 2
RAID technology overview