HP StorageWorks 6400/8400 - Enterprise Virtual Array User Manual page 144

storage system The controllers, storage devices, enclosures, cables, and power supplies and
their software.
Storage System See SSN.
Name
Switch An electro-mechanical device that initiates an action or completes a circuit.
TB Terabyte. A term defining either:
•
•
See also TBps.
TBps
Terabytes per second. A data transfer rate of 1,000,000,000,000 (10
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
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 ed 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.
uninitialized A state in which the storage system is not ready for use.
system See also initialization.
UNRECOVERABLE A drive enclosure EMU condition report that occurs when one or more elements
Condition 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.
unwritten cached Also called unflushed data.
data See also
UPS Uninterruptible Power Supply. A battery-operated power supply guaranteed to
provide power to an electrical device in the event of an unexpected interruption
to the primary power supply. Uninterruptible power supplies are usually rated
by the amount of voltage supplied and the length of time the voltage is supplied.
Vdisk Virtual Disk. A simulated disk drive created by the controllers as storage for one
or more hosts. The virtual disk characteristics, chosen by the storage administrator,
provide a specific combination of capacity, availability, performance, and
144 Glossary
A data transfer rate.
A measure of either storage or memory capacity of 1,099,5111,627,776
40
(2 ) bytes.
IDX and param.
dirty data.
12
) bytes