HP 6400/8400 HP StorageWorks 6400/8400 Enterprise Virtual Array User Guide - Page 141

reporting group RoHS room temperature RPO An Enterprise Storage System controller pair and the associated disk drive enclosures. The Enterprise Storage System controller assigns a unique decimal reporting group number to each EMU on its loops. Each EMU collects disk drive environmental information from its own sub-enclosure and broadcasts the data over the enclosure address bus to all members of the reporting group. Information from enclosures in other reporting groups is ignored. Reduction of Hazardous Substances. See ambient temperature. Recovery point objective. The maximum age of the data you want the ability to restore in the event of a disaster. For example, if your RPO is six hours, you want to be able to restore systems back to the state they were in as of no longer than six hours ago. To achieve this objective, you need to make backups or other data copies at least every six hours. S SCSI-3 SCSI-3 Enclosure Services selective presentation serial transmission SES SFP solid state disk (SSD) SSN storage carrier storage pool storage system Storage System Name switch The ANSI standard that defines the operation and function of fibre channel systems. See SES. The process whereby a controller presents a virtual disk only to the host computer which is authorized access. A method of transmission where each bit of information is sent sequentially on a single channel, not simultaneously on all channels as occurs in parallel transmission. SCSI-3 Enclosures Services. Those services that establish the mechanical environment, electrical environment, and external indicators and controls for the proper operation and maintenance of devices within an enclosure. Small form-factor pluggable transceiver. A high-performance storage device that contains no moving parts. SSD components include either DRAM or EEPROM memory boards, a memory bus board, a CPU, and a battery card. Storage system name. A unique 20-character name, assigned by HP P6000 Command View, that identifies a storage system. See carrier. The aggregated blocks of available storage in the total physical disk array. See array. See SSN. An electro-mechanical device that initiates an action or completes a circuit. symbols and numbers 3U A unit of measurement representing three "U" spaces. "U" spacing is used to designate panel or enclosure heights. Three "U" spaces is equivalent to 5.25 inches (133 mm). See also rack-mounting unit. µm A symbol for micrometer; one millionth of a meter. For example, 50 µm is equivalent to 0.000050 m. T TC Termination Code termination event terminator topology Termination Code. An eight-character hexadecimal display that identifies why controller operations have halted. See TC. The occurrences that cause the storage system to cease operation. Interconnected elements that form the ends of the transmission lines in the enclosure address bus. An interconnection scheme that allows multiple Fibre Channel ports to communicate. Point-to-point, arbitrated loop, and ed fabric are all Fibre Channel topologies. 141