System information

Endurance FTvirtual Server Administrator’s Guide Glossary-5
Redirected disk. A FTvirtual Server redirected
disk that is composed of one disk from each
CoServer. For example, a redirected mirror set
identified by the name “Disk0” is composed of two
physical disks: one residing on CoServer1 and the
other residing on CoServer2.
redirection. Identifies when a system uses a
device that is not directly controlled by that
system. For example, access to the Ethernet and
SCSI devices is redirected by Endurance
software
from the FTvirtual Server to the CoServer.
redirector.
A Endurance FTvirtual Server-
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 bus. Identifies a channel on a SCSI
adapter.
SCSI LUN. Identifies the Logical Unit Number
of a device on a SCSI bus.
SCSI port. A number associated with an adapter
enumerated by the Windows SCSI port driver.
SCSI settings. A SCSI device location defined
by the port number, bus number, target ID, and
LUN.
SCSI target ID. Identifies the target device on a
SCSI bus.
shutdown. A system process that refers to
shutting down either one of (or a combination of)
the CoServers’ and Virtual Server’s copies of the
Windows operating system.
SMI. Structure of Management Information. A
scheme used to describe SNMP constructs and to
write documents describing MIBs. See MIB.
SplitSite.
A configuration in which the
CoServers are physically located in separate
rooms, buildings, or geographical sites.
SNMP. Simple Network Management Protocol.
A protocol designed to allow a common
mechanism to manage diverse devices in a
network environment. It provides functions that
enable the reading and writing of management
data and the generation of traps (event
notifications) when changes occur in element
states or data.
synchronize. A process that results in the
Virtual Server associated with each CoServer
becoming tightly coupled and performing identical
compute processing.
transient. A temporary condition describing a
Endurance
Configuration fault that can be
detected, isolated, and repaired without physically
replacing any hardware components.
Transitioning. A state that indicates a
Endurance component is attempting to boot or
otherwise rejoin the active server configuration.
For specific information on this state as it applies
to particular components, refer to the Endurance
FTvirtual Server Administrator’s Guide.