Symantec 5.1 That acts as a virtual subvolume with special attributes, Extent pool storage array

CommandCentral Glossary 45

Push Install See CommandCentral Storage Agent Push Install Utility.

QoSS (Quality of storage A technique for managing storage resources to fulfill predefined service-level

service)criteria. For each service level, or tier, policy rules are used to ensure the appropriate level of availability and performance. Also called storage tiering.

qtree	In NetApp unified storage devices, special subdirectory of the root of a volume
	that acts as a virtual subvolume with special attributes.
RAID	Redundant Array of Independent Disks. A set of techniques for managing multiple
	disks for cost, data availability, and performance. See also mirroring or striping.
rank	A storage virtualization object created from one or more IBM DS6000 or DS8000
	storage arrays. The storage in ranks can be organized into extent pools. See also
	extent pool storage array.
raw device mapping	A virtual disk that has a LUN directly assigned to its virtual machine without the
(RDM)	layer of a storage pool. In this situation, the LUN is fully dedicated to the virtual
	machine. Additionally, the virtual disk and LUN have a one-to-one mapping.
rediscover	An operation in which up-to-date status information about managed resources
	is sent to the Management Server. The rediscover operation, which a
	CommandCentral Storage operator can initiate through the Console, can be
	performed for a single resource, for a device manager, or for an explorer.
resource	Any of the individual components that work together to provide services on a
	network. A resource may be a physical component such as a storage array or a
	switch, a software component such as Oracle8i or a Web server, or a configuration
	component such as an IP address or mounted file system.
resource type	A way of classifying resources in a cluster. Each resource is identified by its name
	and its resource type. Veritas Cluster Server includes a set of predefined resource
	types for storage, networking, and application services.
robotic library	A collection of tapes controlled and managed through firmware.
router	A device that connects two segments of a storage network and determines the
	optimal path along which traffic should be forwarded. Also gateway. See also
	bridge
SAN (storage area	A network linking servers or workstations to devices, typically over Fibre Channel,
network)	a versatile, high-speed transport. The storage area network (SAN) model places
	storage on its own dedicated network, removing data storage from both the
	server-to-disk SCSI bus and the main user network. The SAN includes one or more
	hosts that provide a point of interface with LAN users, as well as (in the case of
	large SANs) one or more fabric switches and SAN hubs to accommodate a large
	number of storage devices.