Sun Microsystems Sun Fire X4200 - Manual (Page 179)

Glossary-7
E
electrically erasable
programmable read-
only memory
(EEPROM) A type of nonvolatile programmable read-only memory (PROM) that can be
erased by exposing it to an electrical charge.
electrostatic discharge
(ESD) The sudden dissipation of static electrical charge. ESD can easily destroy
semiconductor components.
enhanced parallel port
(EPP) A hardware and software standard that enables systems to transmit data at
twice the speed of standard parallel ports.
erasable programmable
read-only memory
(EPROM) A nonvolatile programmable read-only memory (PROM) that can be written to
as well as read from.
Ethernet An industry-standard type of local area network (LAN) that enables real-time
communication between systems connected directly through cables. Ethernet
uses a Carrier Sense Multiple Access/Collision Detection (CSMA/CD)
algorithm as its access method, wherein all nodes listen for, and any node can
begin transmitting data. If multiple nodes attempt to transmit at the same time
(a collision), the transmitting nodes wait for a random time before attempting
to transmit again.
event A change in the state of a managed object. The event-handling subsystem can
provide a notification to which a software system must respond when it
occurs, but which the software did not solicit or control.
externally initiated
reset (XIR) A signal that sends a “soft” reset to the processor in a domain. XIR does not
reboot the domain. An XIR is generally used to escape from a hung system in
order to reach the console prompt. A user then can generate a core dump file,
which can be useful in diagnosing the cause of the hung system.
F
failover The automatic transfer of a computer service from one system, or more often a
subsystem, to another to provide redundant capability.