HP XP P9500 HP P9000 RAID Manager Reference Guide (T1610-96037, October 2011) - Page 191

Glossary AL allocation BC bit CLI CLPR CNT Cnt Ac-J Cnt Ac-S command device CT group CTGID CU CVS daemon DKA DKC fence level Fibre Channel GUID HDD HORCM_CMD HORCM_DEV HORCM_INST HORCM_LDEV Arbitrated loop. The ratio of allocated storage capacity versus total capacity as a percentage. Allocated storage refers to those logical devices (LDEVs) that have paths assigned to them. Allocated storage capacity is the sum of the storage of these LDEVs. Total capacity is the sum of the capacity of all LDEVs on the disk array. P9000 or XP Business Copy. An HP application that provides volume-level, point-in-time copies in the disk array. The basic unit of data in a binary numbering system (binary digit), represented by a 0 or a 1. Eight bits equals one byte. Command-line interface. An interface comprised of various commands which are used to control operating system responses. Cache logical partition. Computer network technologies. P9000 or XP Continuous Access Journal software. P9000 or XP Continuous Access Synchronous software. 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. Consistency group ID. The group identifier used to identify a group of volumes in the P9500 Disk Array being replicated using asynchronous technology. The consistency group guarantees the sequencing of updates to the secondary volumes. 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. Custom volume size. CVS devices (OPEN-x CVS or 3390-x CVS) are custom volumes configured using array management software to be smaller or larger than normal fixed-size OPEN or mainframe system volumes. Synonymous with volume size customization (VSC). OPEN-V is a CVS-based volume. A process in UNIX systems that runs in the background, without any direct user console or terminal interaction. Disk adapter. Disk controller. 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. Globally unique identifier. Hard disk drive. 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. A section of the RAID Manager instance configuration file that describes the physical volumes corresponding to the paired volume names. A section of the RAID Manager instance configuration file that defines how RAID Manager groups link to remote RAID Manager instances. 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. 191