Fujitsu Siemens Computers SPARC Enterprise M4000, User Manual

Page: 47 / 162

Chapter 2 What You Must Know Before Using DR 2-15
2.2.2.3 Omit-memory Option
When the omit-memory option is enabled, the memory on a system board cannot be
used in the domain.
Even when a system board actually has memory, this option enables you to make the
memory on the system board unavailable through a DR operation to add or move
the system board.
This option can be used when the target domain needs only the CPU (and not the
memory) of the system board to be added.
If a domain has a high load on memory, an attempt to delete a system board from
the domain may fail. This failure results if a timeout occurs in memory deletion
processing (saving of the memory of the system board to be disconnected onto a
disk by paging) when many memory pages are locked because of high load. To
prevent this situation, you can enable the omit-memory option to facilitate the DR
operation beforehand.
Note –
For diagnosis and management of a system board, memory must be
mounted on the system board even if the omit-memory option is enabled. Enabling
the omit-memory option reduces available memory in the domain and may lower
system performance. This option must be used in consideration of the influence on
jobs.
The value of this option is “true” (omit memory) or “false” (do not omit memory).
The default value is “false”.
Note –
Enable the omit-memory option when the system board is in the system
board pool or when the system board is not connected to the domain configuration.
2.2.2.4 Omit-I/O Option
The omit-I/O option disables the PCI cards, disk drives, and basic local-area
network (LAN) ports on a system board to prevent the target domain from using
them.
Set this option to “true” if the domain needs to use only the system board’s CPU and
memory.
Set this option to “false” if the domain needs to use the system board’s PCI cards
and I/O units. In this case you must fully understand the restrictions on use of these
I/O components. And you must stop the software (e.g. application programs or
daemons) that uses them before you attempt to delete or move the system board.
The value of this option is “true” (omit I/O units) or “false” (do not omit I/O units).
The default value is “false”.