DCU
D
DCU Domain configurable unit. The smallest building block for PDomains. SPARC M8-8 and
SPARC M7-8 servers with two PDomains have two DCUs, and SPARC M8-8 and SPARC
M7-8 servers with one PDomain have one DCU. Those DCUs are static. Their assignment
cannot be changed. The SPARC M7-16 server has four DCUs that you can assign to the host in
any one of the four possible PDomains. See also PDomain.
DCU SPM In SPARC M8 and SPARC M7 servers, Oracle ILOM identifies one SPM from an SPM pair to
manage DCU activity. See also SPM, SPP, and DCU.
DHCP Dynamic Host Configuration Protocol. Software that automatically assigns IP addresses
to clients on a TCP/IP network. The SPs do not support DHCP. You must assign static IP
addresses to SP components.
DIMM Dual in-line memory module.
dynamic
PDomain
A SPARC M7-16 PDomain. After stopping the host, you can assign or unassign DCUs to or
from a dynamic PDomain. See also static PDomain and PDomain.
E
EMI Electromagnetic interference.
ESD Electrostatic discharge.
eUSB Embedded USB. A flash-based drive designed specifically to be used as a boot device. An
eUSB does not provide storage for applications or customer data.
F
FC Fibre Channel. High-speed network technology primarily used to connect computer data
storage.
FMA Fault management architecture. Generates fault indictments from the SP. FMA provides three
system activities: error handling, fault diagnosis, and response.
FRU name Names used to identify hardware components in certain Oracle ILOM and system commands
and messages.
318 SPARC M8 and SPARC M7 Servers Service Manual • September 2017
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