Specifications

Glossary GL–11
loop tenancy The period of time between the following events: when a port wins loop
arbitration and when the port returns to a monitoring state.
L_Port A node or fabric port capable of performing Arbitrated Loop functions and
protocols. NL_Ports and FL_Ports are loop-capable ports.
LRU Least recently used. A cache term used to describe the block replacement
policy for read cache.
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.
maintenance
terminal
An EIA-423-compatible terminal used with the controller. This terminal is
used to identify the controller, enable host paths, enter configuration
information, and check the controller’s status. The maintenance terminal is not
required for normal operations.
See also local terminal.
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.
Nontransportable disks also contain metadata to indicate they are uniquely
configured for STORAGEWORKS environments. Metadata can be thought of
as “data about data.”
mirroring The act of creating an exact copy or image of data.
mirrored
write-back caching
A method of caching data that maintains two copies of the cached data. The
copy is available if either cache module fails.
mirrorset See RAID level 1.
MIST Module Integrity Self-Test.
N_port A port attached to a node for use with point-to-point topology or fabric
topology.
NL_port A port attached to a node for use in all three topologies.