Linksys NSS6100 Cisco NSS4000 and NSS6000 Series Network Storage System Admini - Page 184

Aggregation, Group, Mirroring, Network Information Service formerly known as Yellow s. A system

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Glossary of Storage-related Terms and Acronyms D Link Aggregation Group: (LAG) A computer networking term used to describe using multiple Ethernet network cables/ports in parallel to increase the link speed beyond the limits of any one single cable or port. Other terms for this also include "ethernet trunk", "NIC teaming", "port teaming", "port trunking", "NIC bonding" and "link aggregate group" (LAG), and is based on a networking standard known as "IEEE 802.3ad". M MDFS (Microsoft Distributed Filesystem): see DFS. Mirroring: For NAS devices, the automated process of simultaneously writing data to two (or more) hard disk drives. Mirroring creates a redundant repository of data, such that if one of the hard disk drives (HDD) fails, the redundant drive continues to provide access to the stored data for connected users. Network administrators can then replace the failed drive with a new drive that can be re-mirrored to the good drive. RAID level 1 uses mirroring. MTBF (Mean Time Between Failures): A measurement of hardware product reliability typically indicated in thousands, tens of thousands, or hundreds of thousands of operational hours between failures. It is most often defined as the average time between failures. MTBF can be derived from extensive and time intensive testing of the working product, calculated from actual product field performance (depending on the product, its market, its usage, and the ability to retrieve accurate usage data), or from a calculated prediction based on known factors. Manufacturers provide MTBF as a reference of the product's, or its subcomponent's reliability. Customers can use the MTBF to determine their service needs to maintain or replace the product. N NAS (Network Attached Storage): A data storage device on a computer network to provide a centralized repository of data that can be shared and accessed by other end-users or workgroups on the network. The Cisco Small Business NSS products are NAS devices. NFS: Network Filesystem. A protocol suite developed and licensed by Sun Microsystems that allows different makes of computers running different operating systems to share files and disk storage. NIS: Network Information Service (formerly known as Yellow Pages). A system by which one machine (the master) holds the Ethernet addresses of other machines (the servants). NIS is an insecure alternative to DNS. Linksys Small Business NSS4000 and NSS6000 Series Network Storage System Administration Guide 176

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Glossary of Storage-related Terms and Acronyms
Linksys Small Business NSS4000 and NSS6000 Series Network Storage System Administration Guide
176
D
Link
Aggregation
Group
: (LAG) A computer networking term used to describe
using multiple Ethernet network cables/ports in parallel to increase the link speed
beyond the limits of any one single cable or port. Other terms for this also include
"ethernet trunk", "NIC teaming", "port teaming", "port trunking", "NIC bonding" and
"link aggregate group" (LAG), and is based on a networking standard known as
"IEEE 802.3ad".
M
MDFS
(Microsoft Distributed Filesystem): see DFS.
Mirroring
: For NAS devices, the automated process of simultaneously writing data
to two (or more) hard disk drives. Mirroring creates a redundant repository of data,
such that if one of the hard disk drives (HDD) fails, the redundant drive continues to
provide access to the stored data for connected users. Network administrators
can then replace the failed drive with a new drive that can be re-mirrored to the
good drive. RAID level 1 uses mirroring.
MTBF
(Mean Time Between Failures): A measurement of hardware product
reliability typically indicated in thousands, tens of thousands, or hundreds of
thousands of operational hours between failures. It is most often defined as the
average time between failures. MTBF can be derived from extensive and time
intensive testing of the working product, calculated from actual product field
performance (depending on the product, its market, its usage, and the ability to
retrieve accurate usage data), or from a calculated prediction based on known
factors. Manufacturers provide MTBF as a reference of the product’s, or its
subcomponent’s reliability. Customers can use the MTBF to determine their
service needs to maintain or replace the product.
N
NAS
(Network Attached Storage): A data storage device on a computer network
to provide a centralized repository of data that can be shared and accessed by
other end-users or workgroups on the network. The Cisco Small Business NSS
products are NAS devices.
NFS
: Network Filesystem. A protocol suite developed and licensed by Sun
Microsystems that allows different makes of computers running different
operating systems to share files and disk storage.
NIS
: Network Information Service (formerly known as Yellow Pages). A system by
which one machine (the master) holds the Ethernet addresses of other machines
(the servants). NIS is an insecure alternative to DNS.