HP 3PAR StoreServ 7450 4-node HP 3PAR StoreServ Storage Concepts Guide (OS 3.1 - Page 90

physical disk physical parent physical size port-presents VLUN template power bank power supply preserved data preserved data logical disks primary path promote rack rack filler panel rack unit (U) RAID RAID 0 set RAID 10 (RAID 1) set RAID 50 (RAID 5) set RAID MP RAID set RAID type RCFC RCIP region resynchronize roles and rights row row size RSCN A dual-ported Fibre Channel disk mounted onto a drive magazine. The source volume for a physical copy. The total actual raw storage allocated to a logical disk, as determined by its size and RAID type. A VLUN template that allows any host connected to a particular port to see a virtual volume as a specified LUN. A group of four connected AC outlets within the power distribution unit (PDU). There are two power banks in each PDU. A device that converts current from an AC line into appropriate DC levels and provides that power to a system component. Data that is suspended in the system's cache memory due to backend failure. RAID 10 logical disks created by the system during initial system setup to store preserved data. The logical capacity of the preserved data logical disks is equal to the sum of all data cache memory of the system. Connection between a controller node initiator port and a physical disk that is used by default. When the primary path cannot be used (a failure condition), the secondary path is used. The primary and secondary paths are not user configurable and are determined by drive magazine placement. For physical copies: to break the association between a physical copy and a base volume by changing the physical copy into an independent base volume. For virtual copies: to copy the changes from a virtual copy back onto the base volume, therefore overwriting the base volume with the virtual copy. The EIA-standard rack within a cabinet that holds the components of a system. A panel used to seal off an empty 1U, 2U, or 4U space on the rack. All empty spaces in the rack must be sealed for EMI and airflow considerations. The standard unit of height for an EIA-standard rack or components housed in an EIA-standard rack: equivalent to 1.75 in. (4.45 cm). Redundant array of independent disks. Striped rows of chunklets on two or more physical disks. A RAID 0 set offers no data redundancy. A group of mirrored chunklets. A group of parity-protected chunklets. Also known as a parity set. RAID Multi-Parity. A group of double-parity chunklets. A grouping of mirrored or parity-protected chunklets. RAID 0, RAID 10 (1), RAID 50 (5), and RAID MP (6) are all supported RAID types; however, not all RAID types may be available on your system. Remote Copy over Fibre Channel. The use of Remote Copy with two systems that are connected via Fibre Channel ports. Remote Copy over IP. The use of Remote Copy with two systems that are connected via Ethernet ports. A subdivision of a logical disk or virtual volume. The size of a region is always a multiple of 32 MB. To copy changes from one volume in a physical copy pair to the other volume because the original volume was modified at some point after the physical copy operation took place. The roles and rights assigned to a user determine which tasks the user can perform with a system. A grouping of RAID sets. Data is striped across the rows of RAID 10 and RAID 50 logical disks. The number of sets in a row. A row is a grouping of RAID sets. Data is striped across the rows of RAID 10 and RAID 50 logical disks. Registered State Change Notification. A Fibre Channel switch function that allows notification to registered nodes if a change occurs to other specified nodes. 90 Glossary