User`s guide

Glossary
119
SAN
Storage Area Network. It is a network of shared storage devices. Its architecture works in
a way that makes all storage devices available to all servers on a LAN or WAN. As more
storage devices are added to a SAN, they too will be accessible from any server in the
larger network. In this case, the server merely acts as a pathway between the end user and
the stored data.
Schedule
Scheduling allows you set the frequency that the NAS server takes a snapshot image. The
options are Never, Hourly, Daily, and Weekly.
Server
A program that awaits and fulfills requests from client programs in the same or other
computers. A given application in a computer may function as a client with requests for
services from other programs and also as a server of requests from other programs.
Share
A share is a folder that has specific read/write attributes. You can specify that only
certain users and groups can access the folder.
SMB
Server Message Block. Provides a method for client applications in a computer to read
and write to files on and to request services from server programs in a computer network.
SMB can be used over the Internet on top of its TCP/IP protocol or on top of other
network protocols such as Internet Packet Exchange (IPX) and NetBEUI.
Snapshot
A snapshot service gives you a nearly instantaneous virtual copy of your storage volume
with no interruption of service. The underlying backup technology creates an
instantaneous copy of the data being backed up. This is typically accomplished by
splitting a mirrored set of disks or creating a copy of a disk block when it is written,
preserving the original. At restore time, the original is made available immediately,
resulting in almost instantaneous restores.
SNMP
Short for Simple Network Management Protocol, a set of protocols for managing
complex networks. The first versions of SNMP were developed in the early 80s. SNMP
works by sending messages, called protocol data units (PDUs), to different parts of a
network. SNMP-compliant devices, called agents, store data about themselves in
Management Information Bases (MIBs) and return this data to the SNMP requesters.