HP 6100 User Manual page 178

SSN Storage System Name. An HP Command View EVA-assigned, unique 20-character name that
identifies a specific storage system.
storage carrier See carrier.
storage pool The aggregated blocks of available storage in the total physical disk array.
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.
symbols and numbers
3U A unit of measurement representing three "U" spaces. "U" spacing is used to designate panel or
enclosure heights. Three "U" spaces is equivalent to 5.25 inches (133 mm).
See also rack-mounting unit.
µm A symbol for micrometer; one millionth of a meter. For example, 50 µm is equivalent to 0.000050
m.
T
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.
U
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 inside the enclosure
Condition 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 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.
V
virtual disk Variable disk capacity that is defined and managed by the array controller and presented to
hosts as a disk. May be called Vdisk in the user interface.
virtual disk family A virtual disk and its snapshot, if a snapshot exists, constitute a family. The original virtual disk
is called the active disk. When you first create a virtual disk family, the only member is the active
disk.
See also active virtual disk, and virtual disk snapshot.
178 Glossary