HP Array Controller HSG V8.7 Software - Manual (Page 541)

Glossary G–15
port (1) In general terms, a logical channel in a communications system. (2)
The hardware and software used to connect a host controller to a
communications bus, such as a SCSI bus or serial bus.
Regarding the controller, the port is (1) the logical route for data in and
out of a controller that can contain one or more channels, all of which
contain the same type of data. (2) The hardware and software that
connects a controller to a SCSI device.
port_name A 64-bit unique identifier assigned to each Fibre Channel port. The
Port_Name is communicated during the logon and port discovery
process.
preferred address The AL_PA which an NL_Port attempts to acquire first during
initialization.
primary cabinet The primary cabinet is the subsystem enclosure that contains the
controllers, cache modules, external cache batteries, and the PVA
module.
private NL_Port An NL_Port which does not attempt login with the fabric and only
communicates with NL_Ports on the same loop.
public NL_Port An NL_Port that attempts login with the fabric and can observe the
rules of either public or private loop behavior. A public NL_Port may
communicate with both private and public NL_Ports.
program card The PCMCIA card containing the controller’s operating software.
protocol The conventions or rules for the format and timing of messages sent
and received.
PTL Port-Target-LUN. The controller’s method of locating a device on the
controller’s device bus.
PVA module Power Verification and Addressing module.
quiesce The act of rendering bus activity inactive or dormant. For example,
“quiesce the SCSI bus operations during a device warm-swap.”