HP StorageWorks SAN Virtualization Services Platform Manager Command Line Interface User Guide (5697-0936, May 2011)

D
Data Path Module A SAN-based device, separate from the core Fibre Channel switching infrastructure, that provides
storage virtualization services across heterogeneous hosts, storage, and SAN fabrics. The device
runs a VSM fabric agent, communicates with a VSM server, is able to process virtual disk
information, present virtual disks to servers as LUNs, and handle their I/Os by routing them to
storage systems managed by the VSM server.
default boot set The boot set that becomes the active boot set when the system is started, unless the user selects
a different boot set. Applies to the DPM.
DPM See Data Path Module..
DPM group An entity that contains one primary and one secondary Data Path Module. Data Path Modules
can only present virtual disks to hosts after they have been added to DPM groups.
E
entity A virtual object defined as part of VSM’s virtualized configuration of a SAN.
EVA HP StorageWorks Enterprise Virtual Array. A high-performance, high-capacity, and high-availability
storage solution for the high-end enterprise class marketplace. Each EVA storage system consists
of a pair of HSV virtualizing storage controllers and the disk drives they manage.
F
fabric A network of one or more Fibre Channel switches that transmit data between any two N_ports
attached to the member switches.
fabric agent In VSM, a virtualization agent that runs on a DPM. The fabric agent receives virtual disk information
from a VSM server, sets the mapping tables of the DPM, and enables the DPM to route I/O data
from hosts to storage systems.
FC Fibre Channel. A serial data transfer architecture developed by a consortium of computer and
mass storage system manufacturers that requires very high bandwidth. Fibre Channel provides
high reliability transport protocols.
See also and ..
front-side path A path between the host (host bus adapter) and the Data Path Module.
G
Group In VSM, a virtual container that defines one or more elements for a data moving task.
See also VDG..
H
HBA See host bus adapter..
host In VSM, every server that uses VSM virtual disks. Servers that run as VSM servers are also
considered hosts.
host bus adapter A device that provides input/output (I/O) processing and physical connectivity between a server
and a storage system. In order to minimize the impact on host processor performance, the host
bus adapter performs many low-level interface functions automatically or with minimal processor
involvement.
host group A group of hosts that facilitates granting permission for multiple hosts to access the same storage
elements.
I
I/O Input/Output. Data transferred from one device to another.
in use path A path that is currently being used for I/O traffic.
See also active path..
inactive boot set The boot set that is not in use in a running system. Applies to the DPM.
initiator See initiator device..
72 Glossary