HP StorageWorks SAN Virtualization Services Platform 3.0.2 Virtualization Services Manager Demo Mode User Guide (5697-0346, May 2010)

virtual disks, and provides agents with virtual disk information. The VSM server
also moves data in snapclone, migration, and asynchronous mirroring operations.
VSS See Volume Shadow Copy Service.
VSS freeze A period of time during the shadow copy creation process when all services
(writers) have flushed their writes to the volumes and are not initiating additional
writes.
VSS thaw The completion of a VSS shadow copy freeze.
WWNN World Wide Node Name. The globally unique identifier for a system containing
Fibre Channel ports.
A WWN is a 64–bit value, typically represented as a string of 16 hexadecimal
digits.
WWPN World Wide Port Name. The globally unique identifier for an individual Fibre
Channel port.
A WWPN is a 64–bit value, typically represented as a string of 16 hexadecimal
digits.
zone A collection of devices or user ports that are permitted to communicate with each
other through a fabric. Any two devices or user ports that are not members of
at least one common zone are not permitted to communicate with each other.
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