HP 3PAR StoreServ 7400 2-node HP 3PAR StoreServ Storage Concepts Guide (OS 3.1 - Page 86

Glossary Access Guard active VLUN admin volume AL_PA alert alert pane allocation limit allocation warning authentication key A software component that provides volume security at logical and physical levels. Access Guard is part of the HP 3PAR OS Software Suite. The pairing of a virtual volume and a LUN so the host can access its virtual volume and I/O writes can be saved to the virtual volume. The VLUN parameters determine whether a virtual volume is expressed as an active VLUN. VLUNs that are not active will not communicate with the HP 3PAR StoreServ Storage system. The base volume that is used by the system to store administration data such as the system event log. The admin volume is created as part of the system installation and setup process. Arbitrated Loop Physical Address. A unique 8-bit value used to identify Fibre Channel devices on an arbitrated loop. A system event that requires the immediate attention of the user and might also require user intervention. Area at the bottom of the HP 3PAR Management Console main window that displays information about system alerts. User-defined threshold that can be set for Thinly-Provisioned Virtual Volumes and fully-provisioned virtual volumes to cap their potential size. User-defined threshold that can be set for Thinly-Provisioned Virtual Volumes and fully-provisioned virtual volumes to alert users when the volumes reach a certain size. A cryptographic key that protects data integrity on self-encrypting drives. The authentication key, maintained by a local key manager, and backed up and guarded by system administrators, locks and unlocks the drive. availability base volume battery tray BBU cabinet child volume chunklet chunklet logging classes of service clean chunklet cluster CMP component indicator Level of fault-tolerance for a logical disk. For example, magazine-level availability means that the logical disk can tolerate a drive magazine failure. Cage-level availability means that the logical disk can tolerate a drive cage failure. A Thinly-Provisioned Virtual Volume (TPVV) or fully-provisioned virtual volume that has been copied. An enclosure that inserts into an EIA-standard rack to house a maximum of four battery backup units. Battery Backup Unit. A unit containing two batteries. Each Battery Backup Unit supplies two controller nodes with enough current to write the cache to ATA disks if power is interrupted. An enclosure that houses the components of a system. A cabinet is made up of a frame on four wheels, cosmetic panels, a rear door, an EIA-standard rack, PDUs, power cords, and bezels. A virtual volume (virtual or physical copy) created from a parent volume. A block of contiguous storage space on a physical disk. On F-Class and T-Class systems, all chunklets are 256 MB. On HP 3PAR 10000 systems, all chunklets are 1 GB. The process of writing data to a log rather than a chunklet when a chunklet is unavailable (for example, when the disk is not ready). If the chunklet becomes available, the system places the chunklet in playback mode, reads the logged data, and writes the data to the chunklet. The characteristics and guarantees of the transport layer of a Fibre Channel circuit. These classes include connection services (Class 1), guaranteed frame delivery with end-to-end flow control (Class 2), and packetized frame datagrams (Class 3). A chunklet that is set to all zeros, and therefore does not contain any data. A group of controller nodes connected via the same system backplane. The nodes in a cluster operate as a unified system, separate from any other clusters that may share the same service processor. Cache Memory Page. A 16 KB block of control cache memory where I/O requests are stored. HP 3PAR Management Console alert pane icon that represents a logical or physical system component. 86 Glossary