HP XP24000 HP Replication Adapter for VMware vCenter Site Recovery Manager Adm - Page 52

Glossary This glossary defines acronyms and terms used in this guide or related to this product and is not a comprehensive glossary of computer terms. disk array Disk Group DR Group failback failover HBA HORCM HP StorageWorks XP Virtualization Adapter LUN MPIO P-VOL point-in-time copy protected site RAID recovery site S-VOL SRM WWN Two or more hard drives combined as a single logical unit for increased capacity, speed, and fault-tolerant operation. Disk arrays are logically grouped into a storage pool. A named group of disks selected from all the available disks in a disk array. One or more virtual disks can be created from a disk group. Also refers to the physical disk locations associated with a parity group. Data replication group. A logical group of LUNs in a remote replication relationship with a corresponding group on another array. The act of returning ownership of controller resources (in an active-active configuration) from a surviving controller to a previously failed (but now active) controller. The resources include virtual disks, cache data, host ID information, and LUNs and WWNs. Also known as recovery. An operation that reverses replication direction so that the destination becomes the source and the source becomes the destination. Failovers can be planned or unplanned and can occur between DR groups, managed sets, fabrics or paths, and array controllers. Host Bus Adapter. A section of the RAID Manager instance configuration file that defines the disk devices used as command devices by the RAID Manager to communicate with the disk array. A Perl interface between VMware Site Recovery Manager (SRM) and HP StorageWorks Disk Arrays. Logical unit number. A LUN results from mapping a SCSI 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. For example, a LUN associated with two OPEN-3 LDEVs has a size of 4,693 MB. Multipath I/O. A fault-tolerance and performance enhancement technique where there is more than one physical path between the CPU in a computer system and its mass storage devices through the buses, controllers, switches, and bridge devices connecting them. Primary volume. A generic term meaning a static point-in-time copy of a volume, typically used for backup. The datacenter containing the protected virtual machines from which data is being replicated to the recovery site. Redundant array of independent disks. A RAID level is one of the ways that disk drives are grouped together to improve performance, data availability, or reliability, or both. RAID levels are defined from RAID0 to RAID6. HP StorageWorks Disk Arrays in the XP product family support RAID1, RAID5 and RAID6. The datacenter containing the virtual machines that are recovered and perform work while the protected site is unavailable. Secondary or remote volume. The copy volume that receives the data from the primary volume. VMware Site Recovery Manager. World Wide Name. A unique identifier in a Fibre Channel or SAS storage network. The first three bytes are derived from an IEEE Organizationally Unique Identifier (OUI), which identifies the manufacturer or vendor. The remaining five bytes are assigned by the vendor. 52 Glossary