EMI
Electromagnetic Interference. The impairment of a signal by an electromagnetic
disturbance.
EMU
Environmental Monitoring Unit. An element 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 implements corrective action.
enclosure
A unit used to hold various storage system devices such as disk drives, controllers,
power supplies, blowers, an EMU, I/O modules, or blowers.
enclosure address
bus
An Enterprise storage system bus that interconnects and identifies controller
enclosures and disk drive enclosures by their physical location. Enclosures within
a reporting group can exchange environmental data. This bus uses enclosure ID
expansion cables to assign enclosure numbers to each enclosure. Communications
over this bus do not involve the Fibre Channel drive enclosure bus and are,
therefore, classified as out-of-band communications.
enclosure number
(En)
One of the vertical rack-mounting positions where the enclosure is located. The
positions are numbered sequentially in decimal numbers starting from the bottom
of the cabinet. Each disk enclosure has its own enclosure number. A controller
pair shares an enclosure number. If the system has an expansion rack, the
enclosures in the expansion rack are numbered from 15 to 24, starting at the
bottom.
enclosure services
Those services that establish the mechanical environmental, electrical
environmental, and external indicators and controls for the proper operation and
maintenance of devices with an enclosure as described in the
SES SCSI-3
Enclosure Services Command Set (SES), Rev 8b, American National Standard
for Information Services
.
Enclosure Services
Interface
See
ESI
.
Enclosure Services
Processor
See
ESP
.
Enterprise Virtual
Array
The Enterprise Virtual Array is a product that consists of one or more storage
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 storage system.
Enterprise Virtual
Array rack
A unit that holds controller enclosures, disk drive enclosures, power distribution
supplies, and enclosure address buses that, combined, comprise an Enterprise
storage system solution.
Also
called the Enterprise storage system rack.
See also
rack
.
environmental
monitoring unit
See
EMU
.
error code
The portion of an EMU condition report that defines a problem.
ESD
Electrostatic Discharge. The emission of a potentially harmful static electric voltage
as a result of improper grounding.
Glossary
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