C H A P T E R 1
Overview of Dynamic
Reconfiguration
This chapter provides an overview of Dynamic Reconfiguration, which is controlled by the eXtended System Control Facility (XSCF).
1.1DR
Dynamic Reconfiguration (referred to as DR, in this document) enables hardware resources such as processors, memory, and I/O to be added and deleted even while the Solaris TM Operating System (referred to as OS, in this document) is running.
DR has three basic functions; i.e., addition, deletion and move, which can be used for the following purposes.
■Add system boards without stopping the Solaris OS of the domain, to improve business operations or handle higher system loads.
■Temporarily remove a faulty system board for parts replacement without stopping the Solaris OS of the domain, in the event of an error that causes the system board to become degraded.
■Move a resource from one domain to another while continuously operating the domains without physically removing or inserting a system board. Resources can be moved to balance the loads on multiple domains, or to share common I/O resources between domains.
SPARC Enterprise M4000/M5000/M8000/M9000 servers have a unique partitioning feature that can divide one physical system board (PSB) into one logical board (undivided status) or four logical boards. A PSB that is logically divided into one board (undivided status) is called a