FUJITSU SPARC M4000 - Manual (Page 143)

Chapter 2 Setting Up XSCF 2-87
2.2.11 Domain Configuration
Domain Configuration logically assigns (by partitioning) multiple system boards
(XSBs) mounted in the server to domains. One physical system board (PSB) can be
logically divided into 1 (Not divided) or 4 units. It cannot be divided into 2 or 3.
(There are two PSBs in the maximum midrange system configuration.)You can
assign each of the divided system boards to any of the configured domains.
For details on whether to divide a physical system board (PSB) into 1 (Not divided)
or 4 units, see
Section 2.2.12, “System Board Configuration” on page 2-113 .
Note – For an overview of the domain and the system board, see the Overview Guide
for your server. Also, for an overview of the component, see the Service Manual for
your server.
TABLE 2-19 lists terms used in Domain Configuration.
TABLE 2-19 Domain Configuration Terms
Term Description
Domain When hardware resources in the server are logically divided into one or more units, each
set of divided resources can be used as one system, which is called a domain. An OS can
operate in each domain.
PSB The PSB is made up of physical components, and can include 1 CMU (CPU/Memory
Board unit) and 1 IOU (I/O unit) or just 1 CMU. In midrange systems, the CMU is
mounted on MBU (Motherboard unit) . A PSB can also be used as to describe a physical
unit for addition/deletion/exchange of hardware. The PSB can be used in one of two
methods, one complete unit (undivided status) or divided into four subunits.
Note -
On midrange servers, a PSB is a CMU. In a SPARC Enterprise M4000 server, a PSB
makes up the entire motherboard. In a SPARC Enterprise M5000 server, there are two
PSBs on the single motherboard (one PSB contains CPUs 0 to 3 and the other PSB contains
CPUs 4 to 7).
XSB The XSB is made of physical components. In the XSB, the PSB can be either one complete
unit (undivided status) or divided into four subunits. The XSB is a unit used for domain
construction and identification, and can be also used as a logical unit.
LSB A logical unit name assigned to an XSB. Each domain has its own set of LSB assignments.
LSB numbers are used to control how resources such as kernel memory get allocated
within domains.
System board The hardware resources of a PSB or an XSB. A system board is used to describe the
hardware resources for operations such as domain construction and use. In this manual,
the system board refers to the XSB.