User Manual

Glossary
229Enterprise Virtual Array 3000 User Guide
TBps
Terabytes per second. A data transfer rate of 1,000,000,000,000 (10
12
) bytes per second.
TC
Termination Code. An Enterprise Storage System controller 8-character hexadecimal display
that defines a problem causing controller operations to halt.
See also IDX and param.
Termination Code
See TC.
termination event
Occurrences that cause the storage system to cease operation.
terminator
Interconnected elements that form the ends of the transmission lines in the enclosure address
bus.
topology
An interconnection scheme that allows multiple Fibre Channel ports to communicate.
Point-to-point, arbitrated loop, and switched fabric are all Fibre Channel topologies.
transceiver
The device that converts electrical signals to optical signals at the point where the fiber cables
connect to the FC elements such as hubs, controllers, or adapters. Also called a Gigabit
Interface Converter (GBIC).
uninitialized system
A state in which the storage system is not ready for use.
See also initialization.
units
See rack-mounting units.
UNRECOVERABLE Condition
A disk drive enclosure EMU condition report that occurs when one or more elements inside
the enclosure have failed and have disabled the enclosure. The enclosure may be incapable of
recovering or bypassing the failure and will require repairs to correct the condition.
This is the highest level condition and has precedence over all other errors and requires
immediate corrective action.