K
Kb
Kilobit. Approximately one thousand (1,000) bits.
KB
Kilobyte. Approximately one thousand (1,000)
bytes. Used to describe the storage capacity of
hard disk drives and the stripe size in RAIDs. A
kilobyte is usually computed as 10^3 (1,000)
bytes, but can also be computed as 2^10 (1,024)
bytes (often called a “binary kilobyte” and
abbreviated KiB).
KiB
A binary kilobyte. Computer as 2^10 (1,024)
bytes. See “KB”.
L
LAN
See “local area network”.
load balance policy
In multipathing, a set of instructions for the
multipathing software to follow in order to ensure
that I/O transfers through host paths are
optimally routed and that no one path gets
overloaded with data.
local area network
A computer network that links devices within a
small geographic area, such as a building or
group of adjacent buildings.
logical unit
See “volume”.
LUN
Logical Unit Number. An identification scheme
for storage disks that supports a small number of
logical units. On Nexsan storage systems,
LUNs are assigned to volumes and are
addressed as LUN 0 through 254.
M
MAC address
Media Access Control address. A unique,
usually unchanging, identifier assigned to
network interfaces for communications on the
physical network segment. MAC addresses are
most often assigned by the manufacturer of a
network interface device and are stored in its
hardware, read-only memory (ROM), or some
other firmware mechanism.
MAID
Massive Array of Idle Disks. A storage array
where each drive is only spun up on demand as
needed to access the data stored on that drive.
Management Information Base
A virtual database used for managing objects
that can be exchanged between the
SNMP manager and any SNMP agents. These
objects deal with resources (for example, links or
connections) that can be managed on a node.
Each object defined in the MIB is assigned a
unique Object Identifier (OID) in the MIB object
tree.
Management Information Base II
A specific portion of the entire Management
Information Base, as defined in RFC 1213,
which deals with TCP/IP-related attributes. The
SNMP agent allows network management
stations to retrieve or set various management
objects (attributes). These objects are defined in
the MIB.
Mb
Megabit. Approximately one million (1,000,000)
bits.
MB
Megabyte. Approximately one million (1,000,000)
bytes. Used to describe the storage capacity of
hard disk drives. A megabyte is usually
computed as 10^6 (1,000,000) bytes, but can
also be computed as 2^20 (1,048,576) bytes
(often called a “binary megabyte” and
abbreviated MiB).
Glossary
Nexsan High-Density Storage
User Guide
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