EMC Fibre Channel Disk-Array Processor Enclos ure (DPE) Hardware Reference g-3
Glossary
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).
field-replaceable
unit See FRU (field-replaceable unit).
FRU
(field-replaceable
unit)
A hardware assembly that can be replaced on site, instead of at
the point of manufacture.
H
HBA (host-bus
adapter) Another name for Fibre Channel adapter.
host See server.
hot repair See replace under power.
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).
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.
M
memory module See SP memory module.