FW V06.XX/HAFM SW V08.02.00 HP StorageWorks Directors and Edge Switches Glossary (AA-RU5JB-TE, July 2004)

Glossary
40 Directors and Edge Switches Glossary
vital product data
(VPD) — System-level data stored by the backplane in the electrically erasable programmable
read-only memory. This data includes serial numbers and identifies the manufacturer.
VPD
See vital product data.
warning message
Software message that indicates a possible error was detected. See also error message and
information message.
well-known address
A set of address identifiers defined in the Fibre Channel Physical and Signaling Interface
specification that access global server functions such as a login server, management server, or
name server.
wide area network
A network that covers a larger geographical area than a LAN and where telecommunications
links are typically leased through a common carrier. Contrast with metropolitan area network,
and storage area network.
wrap plug
See loopback plug.
wrap test
A test that checks attachment or control unit circuitry, without checking the mechanism itself,
by returning the output of the mechanism as input. A wrap test can transmit a specific character
pattern through a system and compare the pattern received with the pattern transmitted.
World Wide Name
(WWN) — Eight-byte address that uniquely identifies a switch, or a node (end device) on
global networks.
write authorization
Permission for an simple network management protocol (SNMP) management station with the
proper community name to modify writable management information base (MIB) variables.
WWN
See World Wide Name.
zone
Set of devices that can access one another. All connected devices may be configured into one or
more zones. Devices in the same zone can see each other. Devices that occupy different zones
cannot see each other.