LDAP server
A server that provides directory services
through LDAP.
LDAP status
The status of an LDAP server.
line cord
The electrical connection between the ac
power source and the automatic transfer
switch (ATS).
load balancing
Even distribution of load across all
components of the system.
locking
Setting a volume (or snapshot) as
unwritable (read-only).
LUN map
A table showing the mappings of the
volumes to the LUNs.
LUN Logical unit number. Exports a systems
volume into a registered host.
M
mandatory mode
A mode of remote mirroring in which I/O
operation stops whenever there is no
communication to the secondary volume.
master volume
A volume that has snapshots is called the
master volume of its snapshots.
MIB Management Information Base. A
database of objects that can be monitored
by a network management system. SNMP
managers use standardized MIB formats
to monitor SNMP agents.
Microsoft Active directory
See Active Directory
mirror volume
A volume that contains a backup copy of
the original volume.
mirroring
See remote mirroring.
modified State
A snapshot state. A snapshot in modified
state can never be used for restoring its
master volume.
multipathing
Enables host interface modules direct
access to any volume.
P
peer Denotes a constituent side of a coupling.
Whenever a coupling is defined, a
designation is specified for each peer -
one peer is designated primary and the
other is designated secondary.
pool See storage pool.
power cord
The electrical connection between the
uninterruptible power supply and the
automatic transfer switch (ATS).
primary volume
A volume that is mirrored for backup on
a remote storage system.
R
rack The cabinet that stores all of the hardware
components of the system.
remote mirroring
The process of replicating a volume on a
remote system.
remote target connectivity
A definition of connectivity between a
port set of a remote target and a module
on the local storage system.
remote target
An additional storage system used for
mirroring, data migration, and so on.
role The actual role that the peer is fulfilling
as a result of a specific condition, either a
master or a slave.
rule See event notification rule.
S
SAN Storage area network.
SCSI Small computer system interface.
secondary volume
A volume that serves as a backup of a
primary volume.
Simple Network Monitor Protocol
A protocol for monitoring network
devices. See also MIB, SNMP agent, SNMP
manager, SNMP trap.
SMS gateway
An external server that is used to send
SMSs.
642 IBM XIV Storage System User Manual
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