| CommandCentral Glossary 39 |
| deleted objects, destroyed objects cannot be restored to the CommandCentral |
| Storage database by a rediscover operation. Contrast with delete. |
device | A collective term for disks, tapes, disk arrays, tape arrays, and any other objects |
| that store data. Also storage device. |
device handle | The name the operating system uses to identify a storage resource (known as an |
| addressable unit or LUN), and the correct means (driver, system call) to access it. |
| Also OS handle. |
discovery | The process of finding objects on the storage network and adding information |
| about them to a database. In CommandCentral Storage, most discovery is done |
| by the Hardware Abstraction Layer, which stores information about storage |
| resources in the CommandCentral Storage database. Discovery of storage arrays |
| is performed by the Veritas Array Integration Layer (VAIL). See also explorer and |
| extended discovery. |
discovery data store | In CommandCentral Storage version 4.x, the cached database containing the |
| names and attributes of all objects discovered and maintained by the SAN Access |
| Layer (SAL). In version 5.x, the discovery data store no longer exists. Discovery |
| data is stored in the CommandCentral Storage database. |
disk array | A collection of disks controlled and managed through firmware. See also storage |
| array. |
disk device | A rewriteable, randomly addressable data storage device. |
disk group | A collection of disks that share a common configuration. A disk group |
| configuration is a set of records containing detailed information on existing Veritas |
| Volume Manager objects (such as disk and volume attributes) and their |
| relationships. Each disk group has an |
| internally defined unique ID. The root disk group (rootdg) is a special private disk |
| group that always exists. |
File Scanning explorer | Any one of several explorers in CommandCentral Storage that gathers data by |
| scanning data on in host file systems. See also DM (Data Module) Importer. |
DMP (Dynamic | A feature of Veritas Volume Manager that provides greater reliability and better |
Multipathing) | performance by using path failover and load balancing for multiported disk arrays |
| connected to host systems through multiple paths. DMP detects the various paths |
| to a disk using a mechanism that is specific to each supported array type. DMP |
| can also differentiate between different enclosures of a supported array type that |
| are connected to the same host system. |
enclosure | In CommandCentral Storage, a method for visually grouping objects in the |
| Console’s Managing Summary pane or Topology Map. For example, a user might |
| choose to represent a JBOD visually as an enclosure instead of as one or more |
| separate disks. |
