HP StorageWorks XPath OS 7.4.X Administrator Guide (AA-RVHDD-TE, February 2006)

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port log dump
A view of what happens on a switch, from the switch's point of view. The portlogdump command is used
to read the port log.
port name
A user-defined alphanumeric name for a port.
port_name
The unique identifier assigned to a Fibre Channel port and communicated during login and port discovery.
POST
Power-on self-test. A series of tests run by a switch after it is turned on.
protocol
A defined method and set of standards for communication. Determines the type of error-checking, the
data-compression method, how sending devices indicate an end of message, and how receiving devices
indicate receipt of a message.
R_A_TOV
Resource-allocation timeout value. The maximum time a frame can be delayed in the fabric and still be
delivered. See also E_D_TOV.
RAID
Redundant array of independent disks. A collection of disk drives that appear as a single volume to the
server and are fault tolerant through mirroring or parity checking. See also JBOD.
RCS
Reliable Commit Service. Refers to HP-specific ILS command code.
route
With respect to a fabric, the communication path between two switches. Might also apply to the specific
path taken by an individual frame, from source to destination. See also FSPF.
routing
The assignment of frames to specific switch ports, according to frame destination.
RSCN
Registered state change notification. A switch function that allows notification of fabric changes to be sent
from the switch to specified nodes. The fabric controller issues RSCN requests to N_Ports and NL_Ports, but
only if they have registered to be notified of state changes in other N_Ports and NL_Ports. This registration
is performed through the State Change Registration (SCR) Extended Link Service. An N_Port or NL_Port can
issue an RSCN to the fabric controller without having completed SCR with the fabric controller.
SAN
Storage area network. A network of systems and storage devices that communicate using Fibre Channel
protocols. See also fabric.
SAN architecture
The overall design of a storage network solution, which includes one or more related fabrics, each of which
has a topology.