HP MPX200 Data Migration Planning Guide

J
jumbo frame A large IP frame used in high-performance networks to increase performance over long distances.
Jumbo frames are typically 9,000 bytes for GbE, but can refer to anything over the IP MTU (1,500
bytes on an Ethernet).
L
LIP Loop Initialization Process. The initialization process in an arbitrated loop that occurs when the
loop is powered up or a new device is added. One function of a LIP is to assign addresses. All
data transmission on the loop is suspended during a LIP.
loopback A diagnostic tool that routes transmit data through a loopback connector back to the same adapter.
LUN Logical Unit Number. Representation of a logical address on a peripheral device or array of
devices.
LVM Logical Volume Manager.
M
MAC address Media Access Control address. A unique hardware device identifier used in IP address assignment.
management
information base
See MIB.
MGMT Managment.
MIB Management Information Base. A set of guidelines and definitions for SNMP functions.
mount point A node or directory where application data is stored.
MTU Maximum Transmission Unit. The size (in bytes) of the largest packet that a specified layer of a
communications protocol can transfer.
multipathing
software
The LUN may be accessed through multiple ports on a storage array. Each port of a storage
array may be accessed through multiple ports (adapters) in the server. Multipathing software in
the host manages the multiple paths to a LUN.
N
NTP Network Time Protocol. Used for distributing the Coordinated Universal Time by synchronizing
the clocks of computer systems over data networks.
NVRAM Non-Volatile Random Access Memory. A type of memory that retains data even when power is
removed. Holds configuration settings. You can configure NVRAM settings manually or restore
them from a file.
O
OCFS Oracle Cluster File System.
OEM Original Equipment Manufacturer.
P
path A path to a device is a combination of an adapter port instance and a target port as distinct from
internal paths in the fabric network. A fabric network appears to the operating system as an
opaque network between the initiator and the target.
PCI Peripheral Component Interface/Interconnect.
PCM Power and Cooling Module
PDU Protocol Data Unit.
physical disk The raw disk device discovered and configured in the operating system. The object represented
in the operating system is usually associated to a LUN on a storage array.
ping A computer network administration utility used to test whether a specified host is reachable across
an IP network; it is also used to measure the round-trip time for packets sent from the local host
to a destination computer.
86 Glossary