HP StorageWorks 2000i, Reference Manual, Page: 114 / 118

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snap pool A volume that stores data that is specific to snapshots of an associated master volume,
including copy-on-write data and data written explicitly to the snapshots. A snap pool
cannot be mapped.
snapshot A “virtual” volume that preserves the state of a master volume’s data as it existed when the
snapshot was created. Data associated with a snapshot is recorded in both the master
volume and in its associated snap pool. A snapshot can be mapped and written to.
SSD Solid-state drive. Supported SSDs have a SATA interface.
ULP Unified LUN Presentation. A RAID controller feature that enables a host to access mapped
volumes through any controller host port.
unwritable cache data Cache data that has not been written to disk and is associated with a volume that no longer
exists or whose disks are not online. If the data is needed, the volume's disks must be
brought online. If the data is not needed it can be cleared, in which case it will be lost and
data will differ between the host and disk. Unwritable cache is also called orphan data.
vdisk A “virtual” disk comprising the capacity of one or more disks. The number of disks that a
vdisk can contain is determined by its RAID level.
volume A portion of the capacity of a vdisk that can be presented as a storage device to a host.
volume copy Licensed capability to create a copy of (clone) a volume.
WWN World Wide Name. A globally unique 64-bit number that identifies a node process or
node port.
WWNN World Wide Node Name. A globally unique 64-bit number that identifies a node process.
WWPN World Wide Port Name. A globally unique 64-bit number that identifies a node port.