HP StorageWorks SAN Virtualization Services Platform Manager command line interface user guide (AG781-96016, March 2009)

purposes such as data recovery, backup and testing, while the original virtual
disk stays online and continues to be updated.
• A read-write entity that makes PiT data available to any host as a logical
drive.
SNMP Simple Network Management Protocol. The protocol used by the Data Path
Module to report exception conditions to third-party network management
applications.
SSH Secure Shell. A protocol and application for communicating with a remote
computer system. SSH is a more secure alternative to using telnet to communicate
with the Data Path Module.
storage pool In VSM, a set of back-end LUs or stripe sets from which you can create virtual
disks and allocate them to hosts. SVSP storage pools enable you to classify
storage elements into classes of service and provide different classes of service
to different hosts.
stripe set In VSM, a set of back-end LUs across which VSM stripes data, optionally used
to build storage pools.
SVSP domain Consists of all SVSP components and the storage they manage.
synchronous
mirroring
A mode of data mirroring in which the updates on the mirror site are synchronized
between destinations.
system software
image
A software component, capable of being updated, that contains the operating
environment for the Data Path Module, including the SVSP VSM agent for the
Data Path Module.
target Receives commands from the initiator, and after execution, returns
acknowledgement to the initiator.
See also initiator.
target device A device that contains one or more target ports.
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.
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.
HP StorageWorks SAN Virtualization Services Platform Manager command line interface user
guide 85