HP EVA P6000 Storage User Manual
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asynchronous
Events scheduled as the result of a signal requesting the event or that which is without any specified
time relation.
B
backplane
An electronic printed circuit board that distributes data, control, power, and other signals among
components within an enclosure.
bad block
A data block that contains a physical defect.
bad block
replacement
A replacement routine that substitutes defect-free disk blocks for those found to have defects. This
process takes place in the controller and is transparent to the host.
bail lock
The part of the power supply AC receptacle that engages the AC power cord connector to ensure
that the cord cannot be accidentally disconnected.
battery
A rechargeable unit mounted within a controller enclosure that supplies backup power to the
cache module in case of primary power shortage.
baud
The maximum rate of signal state changes per second on a communication circuit. If each signal
state change corresponds to a code bit, then the baud rate and the bit rate are the same. It is
also possible for signal state changes to correspond to more than one code bit so the baud rate
may be lower than the code bit rate.
bay
The physical location of a component, such as a drive, I/O module, or power supply in a disk
enclosure. Each bay is numbered to define its location.
bidirectional
An array that contains both source and destination virtual disks. A bidirectional configuration
allows multidirectional I/O flow among several arrays.
block
Also called a sector. The smallest collection of consecutive bytes addressable on a disk drive. In
integrated storage elements, a block contains 512 bytes of data, error codes, flags, and the
block address header.
blower
See
.
C
cabinet
An alternate term used for a rack.
cable assembly
A fiber optic cable that has connectors installed on one or both ends. General use of these cable
assemblies includes the interconnection of multimode fiber optic cable assemblies with either LC
or SC type connectors.
•
When there is a connector on only one end of the cable, the cable assembly is referred to
as a pigtail.
•
When there is a connector on each end of the cable, the cable assembly is referred to as
a jumper.
CAC
Corrective action code. An HP P6000 Command View graphical user interface (GUI) display
component that defines the action required to correct a problem.
See also
,
cache
High-speed memory that sets aside data as an intermediate data buffer between a host and the
storage media. The purpose of cache is to improve performance.
cache battery
See
carrier
A drive-enclosure-compatible assembly containing a disk drive or other storage devices.
client
An intelligent device that requests the services from other intelligent devices. In the context of HP
P6000 Command View, a client is a computer used to access the software remotely using a
supported browser.
clone
A full copy of a volume usable by an application.
communication
LUN
See
.
condition report
A three-element code generated by the EMU in the form where e.t. is the element type (a
hexadecimal number), en. Is the element number (a decimal number), and ec is the condition
code (a decimal number).
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