Fujitsu Siemens Computers SPARC Enterprise M8000 - Manual (Page 46)

2-14 SPARC Enterprise Mx000 Servers Dynamic Reconfiguration User’s Guide • September 2007
Note – Enable the configuration policy option when the power supply of the
domain is turned off.
2.2.2.2 Floating Board Option
The floating board option controls kernel memory allocation.
Upon deletion of a system board on which kernel memory is loaded, the OS is
temporarily suspended. The suspended status affects job processes and may disable
DR operations. To avoid this problem, use the floating board option to set the
priority of kernel loading into the memory of each system board, which increases the
likelihood of successful DR operations.
To move a system board among multiple domains, this option can be enabled for the
system board to facilitate the system board move.
The value of this option is “true” (to enable the floating board setting) or “false” (to
disable the floating board setting). The default is “false”.
A system board with “true” set for this option is called a floating board. A system
board with “false” set for this option is called a non-floating board.
Kernel memory is allocated to the non-floating boards in a domain by priority in
ascending order of LSB number. When only floating boards are set in the domain,
one of them is selected and used as a kernel memory board. In that case, the status
of the board is changed from floating board to non-floating board. When Copy-
rename is operated by system board deletion or removal, and only floating board
can be used because non-floating board cannot be used, specify the force option (-f).
Configuration of floating board option does not change when the force option is
used.
Note – Enable the floating board option when the system board is in the system
board pool or when the system board is not connected to the domain configuration.
TABLE 2-1 Unit of Degradation
Value Unit of degradation
FRU Hardware is degraded in units of components such as CPU and
memory.
XSB Hardware is degraded in units of system boards (XSB).
System Hardware is degraded in units of domains or the relevant domain is
stopped without degradation.