Mb/s
Megabits (Mb) per second. Used to describe the
speed of network data transmission.
MB/s
Megabytes (MByte) per second. Used to
describe the speed of network data
transmission. 1 MB/s is eight times faster than
1Mb/s.
MiB
A binary megabyte. Computed as 2^20
(1,048,576) bytes. See MByte.
MIB
See “Management Information Base”.
MIB-II
See “Management Information Base II”.
MIME
Multipurpose Internet Mail Extensions. An
Internet standard that extends the format of
email to support text in character sets other than
ASCII, non-text attachments, message bodies
with multiple parts, and header information in
non-ASCII character sets.
mirror
In RAID levels 1 and 10, the method of providing
fault tolerance for a RAID set. All data is written
to two drives in the RAID set, so that if one drive
fails, the data can be read from the other write
location.
multipathing
A means of presenting volumes to a particular
host or hosts via redundant data paths. The
intent is to maintain I/O in the event of a path
failure. Multipathing may also be used to
increase performance. If not configured properly,
multipathing may lead to data corruption, as an
operating system may not inherently realize that
the redundant paths are of the same volume and
thus could treat them as different volumes.
MultiSan IO (MSIO)
One of six Nexsan Storage Tools. Allows
Nexsan storage systems to load-share over
multiple host links (using a load balance policy)
and to switch paths in the event of problems on
the storage area network.
N
NAS
See “network-attached storage”.
network-attached storage
File-level computer data storage connected to a
computer network providing data access to
clients on the network. Network-attached
storage uses specialized hardware, software, or
both, and is often a specialized device built from
the ground up for storing and serving files.
network gateway
See “gateway”.
Nexsan Storage Tools
A suite of six tools—Storage Manager, Shell
Extensions, IP Configuration Tool, Host
Identification Tool, MultiSan IO (MSIO), and
VDS Storage Provisioning—that provide ways to
manage Nexsan storage systems in addition to
the graphical user interface.
O
Object Identifier
In an SNMP Management Information Base, the
unique number identifying a variable that can be
read or set via SNMP.
OID
See “Object Identifier”.
P
parity
In RAID levels 2 through 6, the method of
providing fault tolerance for a RAID set. RAID
parity is created using either a Boolean XOR
(exclusive or) operation (for RAID 2 through 5) or
Reed-Solomon error correction (for RAID 6).
Data from a failed disk can be reconstructed
Glossary
Nexsan High-Density Storage
User Guide
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