Specifications

170 Snap Server Administrator Guide
LCD (liquid crystal display) An electronic device that uses liquid crystal to display
messages on the Snap Server 14000.
LED (light emitting diode) An electronic device that lights up when electricity is passed
through it used on the Snap Server 4400 as status lights.
Linux The GuardianOS is based on the Linux OS, a UNIX-like OS
that was designed to provide personal computer users a
free or very low-cost operating system comparable to
traditional and usually more expensive UNIX systems.
Load balancing Load balancing is only available in dual-Ethernet
configurations. The Ethernet port transmission load is
distributed among two network ports (assuming the cards
are configured for load balancing). An intelligent software
adaptive agent repeatedly analyzes the traffic flow from the
server and distributes the packets based on destination
addresses.
Local group/local user A local user is one defined locally on a Snap Server using
the Administration Tool. The local user is defined by the
server administrator. Windows Domain, ADS, and NIS users
are not considered local.
MAC (media access control) In the Open Systems Interconnection (OSI) model of
communication, the Media Access Control layer is one of
two sublayers of the Data Link Control layer and is
concerned with sharing the physical connection to the
network among several computers. Each Ethernet port has
a unique MAC address. Snap Servers with dual-Ethernet
ports can respond to a request with either port and have two
unique MAC addresses.
Maintenance mode A series of HTML screens that allow you to perform repair,
upgrade, or reinstall the GuardianOS in a disaster recovery
situation.
Master server A server that contains the Backup Express product,
including the catalog and modules that control media
management, scheduling and distributed processing.
MIB (management information base) A MIB is a formal description of a set of network objects that
can be managed using the Simple Network Management
Protocol (SNMP). The format of the MIB is defined as part of
the SNMP.
Mirroring RAID 1 uses mirroring, which stores data on one disk and
copies it to a second disk, creating a redundant storage
solution. RAID 1 is the most secure method of storing
mission-critical data.
Term Definition