HP StorageWorks 8000 NAS User Manual

Page 229

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Glossary 227

Glo
ssa

LAN (Local Area

Network)

A group of computers and other devices, within a specific location (typically

within a building or floor of a building), connected by a communications link

that enables any device to interact with any other on the network. LANs

commonly include microcomputers and shared resources such as laser

printers and storage devices.

Logical drive

A logical grouping of one or more physical drives on a system, commonly

referred to as a RAID set.

LUN (Logical Unit

Number)

A logical unit number (LUN) is a unique identifier used on a SCSI bus that

enables it to differentiate between up to eight separate devices (each of which

is a logical unit). Each LUN is a unique number that identifies a specific unit of

storage, which may be an end user, a file, or an application program.

Machine account

All NT workstations and servers on a network must be provided with a

machine account in order to participate in a domain.

Media Access

Control (MAC)

address

A unique, hardware specific address used to identify a network node.

Metadata

Data that describes data. This includes files names, file properties and

security information, and lists of block addresses at which each file's data is

stored.

Mount

To make a portion of a file system on a remote computer accessible to a local

(client) computer. The term is most commonly used with UNIX-based

computers.

NIC (Network

Interface Card)

An expansion card or other device used to connect a computer to a local area

network.

NFS (Network File

System)

An network protocol designed by Sun Microsystems that allows all network

users to access shared files stored on computers of different types. Users can

manipulate shared files as if they were stored locally on the user's own hard

disk.

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