HP EVA P6000 User Manual page 282

console LUN A SCSI-3 virtual object that makes a controller pair accessible by the host before any virtual disks
are created. Also called a communication LUN.
console LUN ID The ID that can be assigned when a host operating system requires a unique ID. The console
LUN ID is assigned by the user, usually when the storage system is initialized.
container Virtual disk space that is preallocated for later use as a snapclone, snapshot, or mirrorclone.
controller A hardware/software device that manages communications host systems and other devices.
Controllers typically differ by the type of interface to the host and provide functions beyond those
the devices support.
controller A unit that holds one or more controllers, power supplies, fans, transceivers, and connectors.
enclosure
controller event A significant occurrence involving any storage system hardware or software component reported
by the controller to HP P6000 Command View.
controller pair Two connected controller modules that control a disk array.
corrective action See CAC.
code
CRITICAL Condition A drive enclosure EMU condition that occurs when one or more drive enclosure elements have
failed or are operating outside of their specifications. The failure of the element makes continued
normal operation of at least some elements in the enclosure impossible. Some enclosure elements
may be able to continue normal operations. Only an UNRECOVERABLE condition has precedence.
This condition has precedence over NONCRITICAL errors and an INFORMATION condition.
CRU Customer replaceable unit. A storage system element that a user can replace without using special
tools or techniques, or special training.
customer See CRU.
replaceable unit
D
data entry mode The state in which controller information can be displayed or controller configuration data can
be entered. On the Enterprise Storage System, the controller mode is active when the LCD on the
HSV Controller OCP is Flashing.
data replication An operation that reverses data replication direction so that the destination becomes the source
group failover and the source becomes the destination. Failovers can be planned or unplanned and can occur
between DR groups or managed sets (which are sets of DR groups).
default disk group The disk group created when the system is initialized. The disk group must contain a minimum
of eight disks. The maximum is the number of installed disks.
Detailed Fault An HSV Controller OCP display that permits a user to view detailed information about a controller
View fault.
device channel A channel used to connect storage devices to a host I/O bus adapter or intelligent controller.
device ports The controller pair device ports connected to the storage system's physical disk drive array through
the Fibre Channel drive enclosure. Also called a device-side port.
device-side ports See
DIMM Dual Inline Memory Module. A small circuit board holding memory chips.
dirty data The write-back cached data that has not been written to storage media even though the host
operation processing the data has completed.
disk drive A carrier-mounted storage device supporting random access to fixed size blocks of data.
disk drive blank A carrier that replaces a disk drive to control airflow within a drive enclosure whenever there is
less than a full complement of storage devices.
disk drive A unit that holds storage system devices such as disk drives, power supplies, fans, I/O modules,
enclosure and transceivers.
disk failure A method by which a controller pair reserves drive capacity to take over the functionality of a
protection failed or failing physical disk. For each disk group, the controllers reserve space in the physical
disk pool equivalent to the selected number of physical disk drives.
282 Glossary
device ports.