HP NetServer AA 4000 Administrator's Manual page 270

Glossary
T
redirected video. he CE graphical display
that is displayed in a window on the IOPs
redirection. Identifies when a system uses a
device that is not physically located in that system.
For example, access to the Ethernet and SCSI
devices is redirected from the CE to the IOP using
Endurance software
redirector. CE-based software driver that
requests a specific service from a provider.
redundancy. Provides duplicate hardware
components so that if one component fails, the
remaining component continues to provide
service. Redundant components offer higher levels
of system availability than can be provided by a
single component.
SCSI settings. A SCSI device location defined
by the adapter number, bus number, SCSI ID, and
LUN (logical unit number).
shutdown. A system process that refers to
shutting down either one of (or a combination of)
the IOPs' and CE's copies of the Windows NT
operating system.
synchronize. A process that results in both CEs
being tightly coupled, performing identical
compute processing. When a CE is powered up
and another CE is active, the synchronization
process is started for the CE that just completed
power up.
transient. A temporary condition describing a
server fault that can be detected, isolated, and
repaired without physically replacing any
hardware components.
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tuple. A conceptual term that describes half of
the redundant devices in a server. There are two
.
tuples in the server. Each tuple contains a CE, an
IOP, and a network connection.
uninterruptable power supply. See UPS.
UPS. Uninterruptable Power Supply. A battery-
based device that provides a limited supply of
electrical power in the event of a power failure.
Video Provider. Video Provider on the IOP.
Receives the I/O of the CE and makes it available
for display on the IOP.
Video Redirector. Video Redirector on the CE.
Loads the video software on the CE and supports
video I/O on the CE, redirected for display on the
IOP.
virtual network. LAN-style connectivity
between the CE and each IOP. This connectivity is
independent of any public (redirected) or private
(IOP) network adapters.
vulnerable. The state of a server when one or
more components has failed but the system is still
operational and available to end users. The system
is vulnerable to complete failure if certain
additional components fail.