EMC CLARiiON CX700, Hardware Reference Manual

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g-2
CX700 Hardware Reference
Glossary
designed to work with a DPE. A DPE differs from an SPE like the
CX700, which holds no disks but connects to 15-disk DAE2s.
disk-drive module Another name for disk module.
disk module A self-contained disk drive that slides into one of the slots in the front
of a DAE enclosure. The carrier assembly holds the disk drive.
disk unit A short name for physical disk unit.
E
EA (enclosure
address)
A number, selectable on a DAE rear panel, that helps establish a
unique address for each disk module on an FC-AL loop. You must set
the EA on each DAE.
EMI (electromagnetic
interference)
Electronic radiation emitted by an electrical device. The levels of EMI
are strictly controlled for data processing equipment. The EMI
standards are listed in Appendix A of this manual.
ESD (electrostatic
discharge)
The discharge of an accumulated electrical charge (static). This can
severely damage delicate electronic circuits and you should take
steps to prevent this, as explained in the appropriate sections of this
manual.
F
failover The transfer of one or more LUNs from one SP to another if a failure
occurs in the path of the original SP. Unassisted failover requires
properly configured paths between a host and each SP, and
failover/multipath software such as EMC PowerPath
®
.
FC-AL (Fibre Channel
Arbitrated Loop)
An arrangement of Fibre Channel stations such that messages pass
from one to the next in a ring.
Fibre Channel host
bus adapter (FC
adapter)
The name for the printed-circuit board within the computer chassis
that allows the server to access the Fibre Channel loop and thus the
SP(s). Also called a host bus adapter (HBA).
field-replaceable
unit
See FRU (field-replaceable unit) .
FC-SW (Fibre Channel
switch)
An arrangement of Fibre Channel stations into a fabric. Switch
devices in the fabric redirect incoming data out other ports.