Product specifications

FC0051102-00 A B-1
Appendix B
Glossary
This section describes common hardware, software, SCSI, and Fibre Channel terms
that are used in the QMS documentation.
Adapter An adapter is the board that interfaces between the host
system and disk. Adapter is synonymous with host adapter,
adapter board, and Host Bus Adapter (HBA). In the QMS
documentation, the term QLA2xxx adapter is used.
AL_PA AL_PA stands for Arbitrated Loop_Physical Address. This
is a low level address on the Fibre Channel loop.
Arbitrated loop An arbitrated loop is a non-point to point circular topology
where two or more ports can be interconnected, but only two
ports can communicate at one time. All communication is
passed through all ports connected onto the loop.
Cluster A cluster is multiple servers linked together sharing all
resources to deliver high-availability/high-performance
computing.
CRC CRC stands for Cyclic Redundancy Check. CRC is the error
detection technique used by most communication protocols
including Ethernet, Ultra DMA (UDMA), Fibre Distributed
Data Interface (FDDI), and Fibre Channel. CRC is more
powerful than simple parity checking.
DCE DCE stands for Distributed Computing Environment, a
remote procedure call developed by the Open Software
Foundation (OSF).
DMI DMI stands for Desktop Management Interface. DMI is the
industry standard for asset tracking and system management
from the Desktop Management Task Force (DMTF). At the
time of publication, the DMI revision level is 2.0.