DMTF
See Distributed Management Task Force.
domain name server
In the Internet suite of protocols, a server program that supplies
name-to-address conversion by mapping domain names to IP addresses.
DRAM
See dynamic random access memory.
DWDM
See dense wavelength division multiplexing.
dynamic random access memory (DRAM)
A storage in which the cells require repetitive application of control signals
to retain stored data.
E
EC See engineering change.
EIA See Electronic Industries Alliance.
Electronic Industries Alliance (EIA)
An alliance of four trade associations: The Electronic Components,
Assemblies & Materials Association (ECA); the Government Electronics
and Information Technology Association (GEIA); the JEDEC Solid State
Technology Association (JEDEC); and the Telecommunications Industry
Association (TIA). Prior to 1998, EIA was the Electronic Industries
Association and the group dates back to 1924.
empty In a Global Mirror relationship, a status condition that exists when the
consistency group contains no relationships.
engineering change (EC)
A correction for a defect of hardware or software that is applied to a
product.
error code
A value that identifies an error condition.
ESS See IBM TotalStorage
®
Enterprise Storage Server
®
.
exclude
To remove a managed disk (MDisk) from a cluster because of certain error
conditions.
excluded
In SAN Volume Controller, the status of a managed disk that the cluster
has removed from use after repeated access errors.
extent A unit of data that manages the mapping of data between managed disks
and virtual disks.
F
fabric In fibre-channel technology, a routing structure, such as a switch, that
receives addressed information and routes it to the appropriate destination.
A fabric can consist of more than one switch. When multiple fibre-channel
switches are interconnected, they are described as cascading. See also
cascading.
168 IBM System Storage SAN Volume Controller: Hardware Installation Guide
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