HP StorageWorks 6400/8400 - Enterprise Virtual Array User Manual page 132

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 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
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.
default disk group The first disk group created at the time the system in initialized. The default disk
group can contain the entire set of physical disks in the array or just a few of
the disks.
See also
Detailed Fault An HSV Controller OCP display that permits a user to view detailed information
View about a controller fault.
device channel A channel used to connect storage devices to a host I/O bus adapter or intelligent
controller.
device ports 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.
drive enclosure A unit that holds storage system devices such as disk drives, power supplies,
blowers, I/O modules, transceivers, or EMUs.
drive enclosure A significant operational occurrence involving a hardware or software component
event in the drive enclosure. The drive enclosure EMU reports these events to the
controller for processing.
disk failure A method by which a controller pair reserves drive capacity to take over the
protection functionality of a failed or failing physical disk. For each disk group, the
132 Glossary
disk group.
device ports.