HP StorageWorks 6000 HP StorageWorks 6000-series Virtual Library System User G - Page 345

Fibre Channel (FC) A technology for transmitting data between computer devices at data rates of up to 1 or 2 GB/second. FC is especially suited for connecting computer servers to shared storage devices. file A VLS file is a virtual cartridge. Firesafe The holding area for virtual media that is not assigned to a virtual library. Data cannot be restored from virtual media located in the Firesafe until the media is moved into a library. hot plug The ability to add and remove devices to an appliance while the appliance is running and have the operating system automatically recognize the change. infrastructure The physical hardware used to interconnect computers. Infrastructure also includes the software used to send, receive, and manage the signals that are transmitted. initiator Media (host) server that runs the backup/restore application that passes commands and data between the network and the VLS. inputs/outputs per A measure of performance for a host-attached storage device or RAID controller. second library logical unit number (LUN) LUN mapping LUN masking A storage device that handles multiple units of media and provides one or more drives for reading and writing them, such as a physical tape library and virtual tape library. Software emulation of a physical tape library is called a virtual tape library. See also virtual tape library. An address used in the SCSI protocol to access a device within a target. In the case of the VLS, a LUN is assigned to each virtual library and tape drive. A mechanism of changing the LUN assignments for a specific host. An authorization process that makes a LUN available to some hosts and unavailable to other hosts. mean time until data loss (MTDL) media access control (MAC) address media server The average time until a component failure can be expected to cause data loss. This includes the consideration that RAID redundancy can protect against data loss from the failure of a single component. A low-level unique hardware identifier for every Ethernet port in the world that is physically stored inside a network card or similar network interface. MAC addresses are assigned by the IEEE. A computer whose purpose is to move or copy data from one location to another, such as from network clients to tape cartridges in a library. node A server that contains the hardware and firmware required to run a virtual library system. This refers to a hardware assembly containing a power supply, cooling fans, motherboard, expansion boards, and internal hard drives to support the VLS system. oversubscription A condition that exists when more virtual media storage is configured on a VLS than there is physical storage available. Because the VLS dynamically allocates storage space as user data is written, the VLS allows you to allocate more storage for virtual media than is physically available. HP StorageWorks 345