HP StorageWorks HSG60 and HSG80 Array Controller and Array Controller Software Command Line Interface Reference Guide (EK-G80CL-RA. C01, March 2005)

Glossary
326 HP StorageWorks HSG60 and HSG80 Array Controller and Array Controller Software
Command Line Interface Reference Guide
mass storage control protocol
See MSCP
Mbps
Approximately one million (10
6
) bits per second—that is, megabits per second.
MBps
Approximately one million (10
6
) bytes per second—that is, megabytes per second.
member
A container that is a storage element in a RAID array.
metadata
The data written to a disk for the purposes of controller administration. Metadata improves
error detection and media defect management for the disk drive. It is also used to support
storageset configuration and partitioning. Non transportable disks also contain metadata to
indicate they are uniquely configured for HP StorageWorks environments. Metadata can be
thought of as “data about data.”
mirrored writeback caching
A method of caching data that maintains two copies of the cached data. The copy is
available if either cache module fails.
mirroring
The act of creating an exact copy or image of data.
mirrorset
See RAID level 1
MIST
Module Integrity Self-Test.
MSCP
Mass Storage Control Protocol. MSCP is the protocol by which blocks of information are
transferred between the host and the subsystem controller on the CI bus.
multibus failover
Allows the host to control the failover process by moving the unit(s) from one controller to
another.
N_Port
A port attached to a node for use with point-to-point topology or fabric topology.
network
A data communication, a configuration in which two or more terminals or devices are
connected to enable information transfer.
NL_Port
A port attached to a node for use in all three topologies.