HP StorageWorks Data Replication Manager HSG80 ACS Version 8.7P Configuration Guide (AA-RPHZF-TE, March 2004)

Glossary
247Data Replication Manager HSG80 ACS Version 8.7P Configuration Guide
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.
private NL_port
An NL_Port which does not attempt login with the fabric and only communicates with NL_Ports on the same
loop. Not used by DRM.
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. Not used by DRM.
program card
The PCMCIA card containing the controller’s operating software.
See also PCMCIA.
PTL
An acronym for Port-Target-LUN. The controller’s method of locating a device on the controller device bus:
■ P designates the port (1 through 6)
■ T designates the target ID of the device (1 through 6 in a nonredundant configuration, or 0 through 5 in a
dual-redundant configuration)
■ L designates the LUN of the devices (0 through 7).
PVA module
An abbreviation for Power Verification and Addressing module. The Ultra SCSI RAID enclosure assembly
whose primary functions are to: (1) allow the user to select the enclosure Ultra SCSI bus ID; (2) enable the user
to place the subsystem in a standby condition and return it to an operational status; and (3) in conjunction with
the associated EMU, ensures that the major Ultra SCSI elements are functioning properly and notifies the user
and the controller of error or fault conditions.
PVC
An acronym for Permanent Virtual Circuit. PVC is a logical connection manually defined by the network
administrator. The PVC is created by specifying the VPI and VCI.
quiesce
To make a bus inactive or dormant. In a DRM environment, quiesce means to shut down or freeze applications
such that all pending I/O is completed and no new I/O is initiated by the application until a thaw or unquiesce
command is issued. During a device warm swap, the SCSI bus must quiesce.
See also planned failover.