HP StorageWorks 4000/6000/8000 Enterprise Virtual Array Updating Product Software Guide XCS 5.031 (5697-5541, December 2005)

2. In the Storage Management Appliance software, a controllable object,
such as the Enterprise storage system.
EMU Environmental Monitoring Unit. An elem
ent which monitors the status of an
enclosure, including the power, air temperature, and blower status. The EMU
detects problems and displays and reports these conditions to a user and the
controller. In some cases, the EMU impl
ements corrective actions.
enclosure A unit used to hold various storage system devices, such as disk dri ves,
controllers, power supplies, an EMU, I/O modules, or blowers.
Enterprise Virtual
Array
TheEnterpriseVirtualArrayisaproductthatconsistsofoneormorestorage
systems. Each storage system consists of a pair of HSV controllers and the disk
drives they manage. A storage system within the Enterprise Virtual Array can be
formally referred to as an Enterprise storage system, or generically referred to
as the storag e system.
Enterprise Virtual
Array rack
A unit that holds controller enclosures, disk drive enclosures, power distribution
supplies, and enclosure a ddress buses that, combined, comprise an Enterprise
storage system solution. Also called the Enterprise storage system rack.
See also rack.
event Any signifi cant change in the state of the Enterprise Storage System hardware or
software component reported by the controller to HP Command View EVA.
See also controller event, disk drive enclosure event, management agent event,
and termination event.
fabric A Fibre Channel fabric switch or two or more interconnected Fibre Channel
switches that allow data transmission.
Fibre Chann el A data transfer architecture designed for mass storage devices and other
peripheral devices that require very high bandwidth.
Gb Gigabit. A measurement of the rate at which the transfer of bits of data
occurs. Sometimes referred to a s Gbps. Nominally, a Gb is a transfer rate of
1,000,000,000 (10
9
)bitspersecond.
For Fibre Channel transceivers or FC loops the G b transfer rates are:
• 1 Gb is a transmission rate of 1,062,500,000 bits per second.
• 2 Gb is a transmission rate of 2,125,000,000 bits per second.
GUI Graphical User Interface. Software that displays the status of a storage system
and a llows its user to control the storage system.
host A computer that runs user applications and uses (or can potentially use) one or
more virtual disks created and presented by the controller pair.
I/O m odule Input/Output module. The enclosure element that is the FC-AL interface to the
host or controller. I/O modules are bus speed specific, either 1 Gb or 2 Gb.
initialization A process that prepares a storage system for use. Specifically, the system binds
the controllers together as an operational pa ir a nd establishes preliminary
data structures o n the disk array. Initialization also sets up the first disk group,
called the default disk group.
LED Light Emitting D iode. A semiconductor diode, used in an electronic display, that
emits light when a voltage is applied to it.
license key A WWN-encoded sequence that is obtaine d from the license key fulfillment
web site.
LID A Loop Initialization Disruptor (LID) condition exists when a drive prevents loop
initialization from completing on a loop, c ausing the failure of both loops and
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Glossary