HP StorageWorks SAN Director Installation Guide (A7393-90009, May 2007)

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port cage The metal casing extending out of the Fibre Channel port on the switch, and into
which a GBIC or SFP transceiver can be inserted.
Port_Name The unique identifier assigned to a Fibre Channel port. Communicated during login
and port discovery.
POST Power On Self-Test. A series of tests run by a switch after it is powered on.
primary FCS
switch
Primary fabric configuration server switch. The switch that actively manages the
configuration and security parameters for all switches in the fabric.
private loop An arbitrated loop that does not include a participating FL_Port.
private NL_Port An NL_Port that communicates only with other private NL_Ports in the same loop
and does not log into the fabric.
public device A device that supports arbitrated loop protocol, can interpret 8-bit addresses, and
can log into the fabric.
public loop An arbitrated loop that includes a participating FL_Port, and may contain both
public and private NL_Ports.
public NL_Port An NL_Port that logs into the fabric, can function within either a public or a private
loop, and can communicate with either private or public NL_Ports.
quad A group of four adjacent ports that share a common pool of frame buffers.
R_A_TOV Resource allocation time-out value. The maximum time a frame can be delayed in
the fabric and still be delivered.
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.
request rate The rate at which requests arrive at a servicing entity.
route As applies to a fabric, the communication path between two switches. May also
apply to the specific path taken by an individual frame, from source to destination.
routing The assignment of frames to specific switch ports, according to frame destination.
RR_TOV Resource recovery time-out value. The minimum time a target device in a loop waits
after a LIP before logging out a SCSI initiator.
RSCN Registered state change notification. A switch function that allows notification of
fabric changes to be sent from the switch to specified nodes.
SAN Storage Area Network. A network of systems and storage devices that communicate
using Fibre Channel protocols.