HP XP P9500 HP P9000 Continuous Access Synchronous for Mainframe Systems User - Page 149
Glossary - xp remote device access support
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Glossary AL BC BC Z bit CLPR Cnt Ac-J Cnt Ac-J Z Cnt Ac-S Cnt Ac-S Z command device CT group CU DFSMS DKA DKC ERC failover FBA FC-AL FC-FP fence level Fibre Channel FICON instance LDKC local disk local instance LUN LUSE Arbitrated loop. P9000 or XP Business Copy. An HP application that provides volume-level, point-in-time copies in the disk array. The version of Business Copy that supports mainframe volumes. The basic unit of data in a binary numbering system (binary digit), represented by a 0 or a 1. Eight bits equals one byte. 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. Consistency group. 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. Data Facility Storage Management Subsystem. Disk adapter. 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. Fixed-block architecture. Fibre Channel Arbitrated Loop. Fibre Channel Framing Protocol 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. 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. A running copy of RAID Manager. Instances can be local or remote. Multiple instances can run on the same host. Logical disk controller. A disk in the local array. Sometimes refers to a disk in a local host. The RAID Manager instance currently being configured or the instance to which commands are issued. 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. 149