into four boards is called a Quad-XSB. Each composition of physical unit of the divided PSB is called an eXtended System Board (XSB). These XSBs can be combined freely to create domains.

DR functions on these servers are performed on an XSB. This manual uses the term system board unless physical units of PSB and XSB are described. For an explanation of each term, see TABLE 1-2.

Note – This document explains DR functions on system boards. Use the Solaris command cfgadm(1) to execute DR on I/O devices, including PCI cards. For more information, please see the service manual for your system, and the cfgadm(1M) and cfgadm_pci(1M) man pages.

FIGURE 1-1Uni-XSB and Quad-XSB (Midrange Servers)

Uni-XSBQuad-XSB

XSB MBU XSB

XSB XSB XSB XSB MBU XSB XSB XSB XSB

CMU

CMU

IOU

IOU

System boards

1-2SPARC Enterprise Mx000 Servers Dynamic Reconfiguration User’s Guide • September 2007