Fujitsu Siemens Computers SPARC Enterprise M8000 - Manual (Page 49)

Chapter 2 What You Must Know Before Using DR 2-17
If the kernel cage is disabled, the system may run more efficiently, but kernel
memory will be spread among all boards and DR operations will not work on
memory.
To determine whether kernel cage memory is enabled after the system has been
rebooted, check the following message output from the /var/adm/messages file:
If the kernel cage is disabled, the message will be:
In most cases the kernel cage should be enabled. However, you must consider actual
operations before changing the setting. If you do not need to perform DR operations,
you do not need to enable the kernel cage.
To enable kernel cage memory, remove or comment out the following setting from
the /etc/system file:
The OS must be rebooted to make the new setting effective.
2.4 Status Management
The success of DR operations depends on the status of domains and system boards.
This section describes the status information on the domains and system boards
managed by XSCF, and the points to be noted for a better understanding of DR
operation conditions.
2.4.1 Domain Status
XSCF manages the status of each domain.
You can display and reference the status of each domain through a user interface
provided by XSCF. For details of the user interface, see
Chapter 3 , DR User
Interface.
NOTICE: DR kernel Cage is ENABLED
NOTICE: DR kernel Cage is DISABLED
set kernel_cage_enable=0