HP StorageWorks XP12000 HP StorageWorks XP12000 Disk Array Owner's Guide (AE00 - Page 50

MIX mirroring consistency mm MR ms, msec mutual hot standby system NAS node NVS OFC OLM OS PA parity group partition path PCI port P-P PS RS RAID RAID group A circuit board in the disk control unit that includes disk adapters and channel adapters for interfacing disk drives and the host to cache memory. The consistency (usability) of data in a volume (for example, S-VOL). Millimeters. Magnetoresistive. Milliseconds. Two servers that are poised to cover for each other if necessary. Network attached storage. Logically speaking, an environment where instances can be executed. Physically, a processor, which is an element of a cluster system. Nonvolatile storage. Open Fibre Control. Optical link module. Operating system. Physical address. A parity group is a disk configuration in which multiple disks work together to provide redundancy. Synonymous with "array group." Dividing a specific physical disk into two or more areas as if there are two or more physical disks. Paths are created by associating a port, a target, and a LUN ID with one or more LDEVs. Power control interface or peripheral component interconnect. A physical connection that allows data to pass between a host and the disk array. The number of ports on an XP disk array depends on the number of supported I/O slots and the number of ports available per I/O adapter. The XP family of disk arrays supports Fibre Channel (FC) ports as well as other port types. Ports are named by port group and port letter, such as CL1-A. CL1 is the group, and A is the port letter. Point-to-point. Power supply. Russellstoll®,, a brand of electrical plugs and receptacles manufactured by Thomas & Betts Corporation Redundant array of independent disks. See array group. 50 Glossary