HP Rp7410 - Server - 0 MB RAM Administrator's Manual page 204

Table 7-1 Hardware Management Task Summaries (continued)
Task
"Enabling and Disabling
Hyper-Threading on
Dual-Core Intel®
Itanium® 2 Processors"
"Configuring and
Deconfiguring Memory
(DIMMs)"
"Complex Health
Analysis of a Server"
204 Managing Hardware Resources
Summary
• CAUTION: Some operating systems do not support Hyper-Threading. Problems can
occur when running an OS that does not support Hyper-Threading on an nPartition
that has Hyper-Threading enabled.
• NOTE:
You must reset an nPartition when changing its Hyper-Threading status.
Hyper-Threading will not be enabled or disabled until after the nPartition is reset.
• EFI Shell: cpuconfig threads command.
cpuconfig threads on to schedule Hyper-Threading to be enabled after the
nPartition is reset.
cpuconfig threads off to schedule Hyper-Threading to be disabled after the
nPartition is reset.
• HP-UX: setboot command.
setboot -m on to schedule Hyper-Threading to be enabled after the nPartition is
reset.
setboot -m off to schedule Hyper-Threading to be disabled after the nPartition
is reset.
• Enhanced nPartition Commands: parmodify -pn -T [y|n] command to enable
(-T y) or disable (-T n) Hyper-Threading for the specified nPartition (-pn, where n
is the nPartition number) the next time the nPartition is reset.
• Partition Manager: When performing the Create nPartition or Modify nPartition tasks,
select or deselect the Enable Hyper-Threading check box on the Configure Memory
tab to configure the Hyper-Threading status the next time an nPartition is reset.
See "Enabling and Disabling Hyper-Threading on Dual-Core Intel® Itanium® 2
Processors" (page 218).
• NOTE: DIMMs operate either in ranks of four or echelons of two, depending on the
memory architecture of the server. When you deallocate a DIMM, all other DIMMs
in the rank or echelon also will not be used the next time the nPartition boots.
Each rank or echelon is numbered (0, 1, 2, and so on up to hexadecimal number F as
needed). The DIMMs in the rank or echelon are lettered (A to D). For example, rank
0 includes DIMMs 0A, 0B, 0C, and 0D; echelon 1 has DIMMs 1A and 1B.
After the DIMM configuration is changed the nPartition in which it resides must be
rebooted to use the new configuration.
• BCH Menu: Service Menu, DIMMDEALLOC command.
DIMMDEALLOC cell dimm OFF deconfigures the specified DIMM (dimm) on the cell
(cell) indicated.
DIMMDEALLOC cell dimm ON configures the DIMM on the cell.
Use DIMMDEALLOC cell to display the DIMM configuration for the specified cell.
• EFI Shell: dimmconfig command.
dimmconfig cell dimm OFF deconfigures the specified DIMM (dimm) on the cell
(cell) indicated.
dimmconfig cell dimm ON configures the DIMM on the cell.
Use dimmconfig cell to display the DIMM configuration for the specified cell.
See "Configuring and Deconfiguring Memory (DIMMs)" (page
• Complex health analysis provides both an evaluation of the complex hardware and
an evaluation its nPartition configurations.
• Partition Manager: Use the Complex Analyze Complex Health action.
See "Complex Health Analysis of a Server" (page
220).
222).