HP SAN Virtualization Services Platform - Manual (Page 36)

target port A Fibre Channel port capable of presenting one or more SCSI LUNs to servers.
A target is also known as the destination of a server's I/O request.
task In VSM, a process that carries out a data moving task on a group.
temporary virtual
disk A virtual disk created when a PiT is created on another virtual disk. The temporary
virtual disk holds any modifications redirected from the original virtual disk after
the PiT is created.
thick provisioned A quality of virtual disks wherein the virtual disk’s allocated capacity is always
equal to its total capacity.
See also
virtual disk .
thin provisioned A quality of virtual disks wherein the virtual disk’s allocated capacity is set to a
small initial value that can expand up to the virtual disk’s total capacity according
to actual usage.
transaction
consistent The state of the media behind a logical unit, such that all pending writes have
been completed, and all caches are empty.
transceiver A device that provides an interface between the Data Path Module hardware
and the external network cable. The Data Path Module uses 4–Gbps optical
small form-factor pluggable transceivers.
UDH User defined hosts are all servers other than the VSM servers that are attached
to the SVSP domain.
valid boot set A DPM boot set that contains a usable system image.
VDG Virtual Disk Group. A single entity that encapsulates multiple virtual disks or
snapshots to enable synchronized operations on the members.
virtual disk In VSM, a unit of storage allocated to one or more hosts from a storage pool. A
virtual disk can range in size from 1 GB to 2 TB. DPMs present allocated virtual
disks to hosts as logical drives.
VMA Virtualization Management Appliance.
Volume Shadow
Copy Service A backup infrastructure for the Microsoft Windows Server 2003/2008 operating
systems, as well as a mechanism for creating consistent point-in-time copies of
data known as shadow copies.
VSM Virtualization Services Manager. Short for the HP StorageWorks SAN
Virtualization Services Platform Manager application.
VSM API virtual
disk A virtual disk that enables a host to direct VSM CLI commands to a VSM server
through a DPM. May also be seen as SANAPI on the VSM GUI Maintenance
screen.
VSM client The management interface for VSM servers. The VSM client runs on any PC
connected to a VSM server workstation through an IP connection.
VSM GUI Graphical user interface used to manage the HP StorageWorks SAN Virtualization
Services Platform environment.
VSM server VSM software that runs on a dedicated appliance connected to a SAN fabric
and manages and controls all storage systems on the SAN. A VSM server
virtualizes the storage space on the storage systems, creates storage pools and
Glossary 36