HP XP RAID Manager Software - Manual (Page 92)

Glossary
AL-PA Arbitrated loop physical address. A 1-byte value that the arbitrated loop topology uses to identify
the loop ports. This value becomes the last byte of the address identifier for each public port on
the loop.
BC P9000 or XP Business Copy. An HP application that provides volume-level, point-in-time copies
in the disk array.
CB Circuit Breaker.
CLI Command-line interface. An interface comprised of various commands which are used to control
operating system responses.
Cnt Ac-J P9000 or XP Continuous Access Journal software.
Cnt Ac-S P9000 or XP Continuous Access Synchronous software.
command device A volume in the disk array that accepts Continuous Access, Business Copy, or P9000 for Business
Continuity Manager control operations, which are then executed by the array.
CU Control Unit. Used to organize the storage space attached to the disk controller (DKC). You can
group similarly configured logical devices (LDEVs) with unique control unit images (CUs). CUs
are numbered sequentially. The disk array supports a certain number of CUs, depending on the
disk array model. Each CU can manage multiple LDEVs; therefore, both the CU number and the
LDEV number are required to identify an LDEV.
daemon A process in UNIX systems that runs in the background, without any direct user console or terminal
interaction.
DKA Disk adapter.
DKC Disk controller.
failover The process that occurs when one device assumes the workload of a failed companion device.
Failovers can be planned or unplanned.
FICON Fibre connectivity. An FC layer 4 protocol used to map mainframe channel command and data
I/O operations onto standard FC infrastructure, protocol, and FC services.
GUID Globally unique identifier.
HORCM_CMD A section of the RAID Manager instance configuration file that defines the disk devices used as
command devices by RAID Manager to communicate with the disk array.
HORCM_DEV A section of the RAID Manager instance configuration file that describes the physical volumes
corresponding to the paired volume names.
HORCM_INST A section of the RAID Manager instance configuration file that defines how RAID Manager groups
link to remote RAID Manager instances.
HORCM_INSTP A section of the RAID Manager instance configuration file that defines the same information as
the HORCM_INST section, but also allows you to specify the path ID of the Continuous Access
software link for each device group.
HORCM_LDEV A section of the RAID Manager instance configuration file that specifies stable LDEV and serial
numbers of physical volumes that correspond to paired logical volume names.
HORCM_MON A section of the RAID Manager instance configuration file that describes the host name or IP
address, the port number, and the paired volume error monitoring interval of the local host.
instance A running copy of RAID Manager. Instances can be local or remote. Multiple instances can run
on the same host.
LCP Local control port.
local instance The RAID Manager instance currently being configured or the instance to which commands are
issued.
LUN Logical unit number. A LUN results from mapping a logical unit number, port ID, and LDEV ID to
a RAID group. The size of the LUN is determined by the emulation mode of the LDEV and the
number of LDEVs associated with the LUN.
92 Glossary