EMC CX200-Series, Hardware Reference Manual

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EMC CX200-Series DPE2 Hardware Reference
Glossary
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 the enclosure. The carrier assembly holds the disk drive.
disk unit A short name for physical disk unit.
DPE (disk processor
enclosure)
A storage device that includes an enclosure, disk modules, Fibre
Channel storage processors, power supplies, and cooling modules.
E
EA (enclosure
address)
A number, selectable on a CX200 or DAE2 rear panel — fixed at 0 on a
DPE2 — that helps establish a unique address for each disk module
on an FC-AL loop. You must set the EA on each DAE2. Since the
CX200 EA is 0, you should set the DAE2 EA on the single loop (0) to
1.
EMI (electromagnetic
interference)
Electronic radiation emitted by an electrical device. The levels of EMI
are strictly controlled for data processing equipment. The EMI
standards to which the CX200-Series complies 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 so you should take steps
to prevent this, as explained in Chapter 3, Servicing and Upgrading a
CX200-Series DPE2.
F
failover The automatic transfer of one or more LUNs from one SP to another if
a failure occurs in the path of the original SP.
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
through which the server gains access to the Fibre Channel loop and
thus the SP(s).
field-replaceable
unit
See FRU (field-replaceable unit).