HP Storage Essentials Enterprise Edition Software - Manual (Page 770)

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mapped Mapped is capacity that is accessible by one or more hosts external to the array
(aggregated capacity of volumes that are accessible from hosts external to the
subsystem).
meta device This term is used by EMC. A meta device is a device that is a concatenation of several
devices.
metavolume Metavolumes are created from a disk, slice, stripe, or other metavolumes. Metavolumes
are extremely useful because they can expand their storage capacity, such as to
mainframe volume sizes. Also referred to “LDEVs” for HDS storage systems.
missing element
The management server was able to discover the element, but it lost contact with the
element before more information could be gathered during “Get the Topology” or
Discovery Data Collection. A missing element can be managed if the management
server lost contact with the element after Discovery Data Collection was performed.
multipathing The process of providing a server more than one path to a storage system. So that in
the case of an emergency, the server will have continuous access to the storage system.
Multipathing can be done many ways. For example, you can provide redundant
switches for a server to access a storage system. Another example of multipathing is
providing redundant paths from the server to the switch.
P
provider A provider is software that is used to gather information about an element.
proxy server A device, such as a host, connected to a storage system. It is sometimes referred to as
a storage system proxy or an API proxy. An example of a proxy server is the EMC
Solutions Enabler or Hitachi HiCommand Device Manager. LSI storage systems do not
require a proxy, as they can be accessed directly.
S
SAN A Storage Area Network (SAN) is a high speed network configuration that is
dedicated to transporting storage data among network devices, such as storage
systems, hosts (servers), switches, and tape libraries to end users. In addition to
connecting local elements to storage arrays, it may also be extended to off site or
remote locations for the purposes of backup, archival or acting as a hot site in the
event of a disaster.
A SAN can communicate via current technologies such as ESCON (mainframe), fibre
channel, or newer technology such as iSCSI. SAN’s can support several configurations