HP 6400/8400, User Manual

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storage system The controllers, storage devices, enclosures, cables, and power supplies and
their software.
Storage System
Name See SSN .
Switch An electro-mechanical device that initiates an action or completes a circuit.
TB Terabyte. A term defining either:
• A data transfer rate.
• A measure of either storage or memory capacity of 1,099,5111,627,776
(2
40
) bytes.
See also TBps .
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 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
system A state in which the storage system is not ready for use.
See also initialization .
UNRECOVERABLE
Condition A 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 .
unwritten cached
data Also called unflushed data.
See also dirty data .
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
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