EMC Disk-Array Processor Enclosure (DPE) Deskside Model FC4400/4500 Hardware Reference
g-3
Glossary
field-replaceable
unit
See also FRU (field-replaceable unit).
FRU
(field-replaceable
unit)
A hardware assembly that can be replaced on site, instead of at
the point of manufacture.
G
GBIC
Gigabyte Interface Card.
H
HBA (host-bus
adapter)
Another name for Fibre Channel adapter.
host
hot repair
hub
An FC_AL switching device that allows multiple servers and
targets such as storage systems to connect at a central point. A
single hub configuration appears as a single loop.
J
JBOD (just a box of
disks)
Another application for DAE (Disk Array Enclosure). An
application of the DAE when directly connected to the host HBA.
L
LCC (link control
card)
A CRU in an enclosure that connects Fibre Channel signalling to
the disk modules. Provides fiber channel connectivity between
the SP, disks, and other enclosures. It also provides bypass
capability for faulted or missing units, and monitors and controls
enclosure elements.
LUN (logical unit)
One or more disk modules (each having a head assembly and
spindle) bound into a group — usually a RAID group. The
operating system sees the LUN, which includes one or more disk
modules, as one contiguous span of disk space.