IBM DCS3860, Installation, User'S, And Maintenance Manual

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MAC See medium access control .
management information base (MIB)
The information that is on an agent. It is
an abstraction of configuration and status
information.
man pages
In UNIX-based operating systems, online
documentation for operating system
commands, subroutines, system calls, file
formats, special files, stand-alone utilities,
and miscellaneous facilities. Invoked by
the
man
command.
MCA See micro channel architecture .
media scan
A media scan is a background process
that runs on all logical drives in the
storage system for which it has been
enabled, providing error detection on the
drive media. The media scan process
scans all logical drive data to verify that it
can be accessed, and optionally scans the
logical drive redundancy information.
medium access control (MAC)
In local area networks (LANs), the
sublayer of the data link control layer that
supports medium-dependent functions
and uses the services of the physical layer
to provide services to the logical link
control sublayer. The MAC sublayer
includes the method of determining when
a device has access to the transmission
medium.
Metro Mirroring
This term is used to refer to a remote
logical drive mirror pair which is set up
with Metro Mirror. See also
remote
mirroring , Global Mirroring .
MIB See management information base .
micro channel architecture (MCA)
Hardware that is used for PS/2 Model 50
computers and above to provide better
growth potential and performance
characteristics when compared with the
original personal computer design.
Microsoft Cluster Server (MSCS)
MSCS, a feature of Windows NT Server
(Enterprise Edition), supports the
connection of two servers into a cluster
for higher availability and easier
manageability. MSCS can automatically
detect and recover from server or
application failures. It can also be used to
balance server workload and provide for
planned maintenance.
mini hub
An interface card or port device that
receives short-wave fiber channel GBICs
or SFPs. These devices enable redundant
fibre channel connections from the host
computers, either directly or through a
fibre channel switch or managed hub,
over optical fiber cables to the DS4000
Storage Server controllers. Each DS4000
controller is responsible for two mini
hubs. Each mini hub has two ports. Four
host ports (two on each controller)
provide a cluster solution without use of
a switch. Two host-side mini hubs are
shipped as standard. See also
host port,
gigabit interface converter (GBIC), small
form-factor pluggable (SFP)
.
mirroring
A fault-tolerance technique in which
information on a hard disk is duplicated
on additional hard disks. See also
remote
mirroring .
model The model identification that is assigned
to a device by its manufacturer.
MSCS See Microsoft Cluster Server .
network management station (NMS)
In the Simple Network Management
Protocol (SNMP), a station that runs
management application programs that
monitor and control network elements.
NMI
See non-maskable interrupt .
NMS
See network management station .
non-maskable interrupt (NMI)
A hardware interrupt that another service
request cannot overrule (mask). An NMI
bypasses and takes priority over interrupt
requests generated by software, the
keyboard, and other such devices and is
issued to the microprocessor only in
disastrous circumstances, such as severe
memory errors or impending power
failures.
node A physical device that allows for the
transmission of data within a network.
node port (N_port)
A fibre-channel defined hardware entity
that performs data communications over
the fibre-channel link. It is identifiable by
Glossary
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