HP XP P9500 HP P9000 Continuous Access Journal User Guide (AV400-96399, Octobe - Page 183
Glossary, Cnt Ac-J, command device, failover, fence level, Fibre Channel, instance, configuration file - xp remote device access support
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Glossary CLI CLPR Cnt Ac-J Cnt Ac-J Z Cnt Ac-S Cnt Ac-S Z command device CU DKC ERC failover fence level Fibre Channel instance instance configuration file LDKC LUN LUSE M-VOL MCU MU P-VOL parity group path PCB port Command-line interface. An interface comprised of various commands which are used to control operating system responses. Cache logical partition. P9000 or XP Continuous Access Journal software. The version of Continuous Access Journal that supports mainframe volumes. P9000 or XP Continuous Access Synchronous software. The version of Continuous Access Synchronous that supports mainframe volumes. 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. 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. Disk controller. Error reporting communications. The process that occurs when one device assumes the workload of a failed companion device. Failovers can be planned or unplanned. A method of setting rejection of P9000 or XP Continuous Access write I/O requests from the host according to the condition of mirroring consistency. A data transfer architecture designed for mass storage devices and other peripheral devices that require high bandwidth. A running copy of RAID Manager. Instances can be local or remote. Multiple instances can run on the same host. A RAID Manager file that defines the link between a volume and a RAID Manager instance. This file consists of five sections: HORCM_MON, HORCM_CMD, HORCM_DEV, HORCM_LDEV, and HORCM_INST. Logical disk controller. 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. Logical Unit Size Expansion. The LUSE feature is available when the HP StorageWorks LUN Manager product is installed, and allows a LUN, normally associated with only a single LDEV, to be associated with 1 to 36 LDEVs. Essentially, LUSE makes it possible for applications to access a single large pool of storage. Main volume. Main control unit. Mirror unit. Primary volume. A set of hard disk drives that have the same capacity and that are treated as one group. A parity group contains both user data and parity information, which enables user data to be accessed if one or more drives in the group is not available. A path is created by associating a port, a target, and a LUN ID with one or more LDEVs. Also known as a LUN. Printed circuit board. A physical connection that allows data to pass between a host and the disk array. The number of ports on a disk array depends on the number of supported I/O slots and the number of ports available per I/O adapter. The P9000 and XP family of disk arrays supports Fibre Channel (FC) 183