HP StorageWorks 4400 Enterprise Virtual Array user ... - BUSINESS IT

communication
logical unit
number (LUN)
See console LUN.
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.
See also console LUN.
controller A hardware/firmware 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
enclosure
A unit that holds one or more controllers, power supplies, fans, transceivers, and
connectors.
controller event A significant occurrence involving any storage system hardware or software
component reported by the controller to HP Command View EVA.
controller pair Two interconnected controller modules which together control the disk enclosures
in the storage system.
corrective action
code
See CAC.
CRU Customer Replaceable Unit. A storage system element that a user can replace
without using special tools or techniques, or special training.
customer
replaceable unit
See CRU.
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 disk group.
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 device ports.
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.
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