HP Array Controller HSG V8.7 Software - Manual (Page 538)

G–12 HSG80 User’s Guide
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.
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.
network A data communication, a configuration in which two or more terminals
or devices are connected to enable information transfer.
node In data communications, the point at which one or more functional
units connect transmission lines.
Non-L_Port A Node of Fabric port that is not capable of performing the Arbitrated
Loop functions and protocols. N_Ports and F_Ports loop-capable ports.
non-participating mode A mode within an L_Port that inhibits the port from participating in
loop activities. L_Ports in this mode continue to retransmit received
transmission words but are not permitted to arbitrate or originate
frames. An L_Port in non-participating mode may or may not have an
AL_PA. See also participating mode.
nominal membership The desired number of mirrorset members when the mirrorset is fully
populated with active devices. If a member is removed from a
mirrorset, the actual number of members may fall below the “nominal”
membership.
node In data communications, the point at which one or more functional
units connect transmission lines. In fibre channel, a device that has at
least one N_Port or NL_Port.