MSA 2040 SMU Reference Guide

186 Glossary
storage system A controller enclosure with at least one connected drive enclosure. Product documentation
and interfaces use the terms storage system and system interchangeably.
syslog A protocol for sending event messages across an IP network to a logging server.
UCS Transformation
Format - 8-bit
See UTF-8.
ULP Unified LUN Presentation. A RAID controller feature that enables a host to access mapped
volumes through any controller host port. ULP incorporates Asymmetric Logical Unit Access
(ALUA) extensions.
Unified LUN
Presentation
See ULP.
unmount To remove access to a volume from a host OS. Synonyms for this term include unpresent
and unmap.
unwritable cache data Cache data that has not been written to disk and is associated with a volume that no longer
exists or whose disks are not online. If the data is needed, the volume’s disks must be
brought online. If the data is not needed it can be cleared, in which case it will be lost and
data will differ between the host and disk. Unwritable cache data is also called orphan
data.
UTC Coordinated Universal Time. The primary time standard by which the world regulates clocks
and time. It replaces Greenwich Mean Time.
UTF-8 UCS transformation format - 8-bit. A variable-width encoding that can represent every
character in the Unicode character set used for the CLI and WBI interfaces.
vdisk A virtual disk comprising the capacity of one or more disks. The number of disks that a
vdisk can contain is determined by its RAID level.
vdisk spare See dedicated spare.
virtual disk See vdisk.
volume A portion of the capacity of a vdisk that can be presented as a storage device to a host.
volume copy An independent copy (clone) of the data in a volume. The capability to create volume
copies makes use of snapshot functionality.
WBEM Web-Based Enterprise Management. A set of management and internet standard
technologies developed to unify the management of enterprise computing environments.
web-based
interface/web-browser
interface
See WBI.
WBI Web-based interface/web-browser interface. The primary interface for managing the
system. A user can enable the use of HTTP, HTTPS for increased security, or both.
Web-Based Enterprise
Management
See WBEM.
World Wide Name See WWN.
World Wide Node
Name
See WWNN.
World Wide Port Name See WWPN.
WWN World Wide Name. A globally unique 64-bit number that identifies a device used in
storage technology.
WWNN World Wide Node Name. A globally unique 64-bit number that identifies a device.
WWPN World Wide Port Name. A globally unique 64-bit number that identifies a port.