Hitachi CB 520H A1 User Manual page 256

This deactivation operation works only on LPARs that are activated.
Move the cursor over the 'Sta' column of the 'LPAR' row that you want to
deactivate, and press Enter. Move the cursor over "Deactivate" on the
displayed sub-screen and press Enter.
You can also deactivate an LPAR by pressing F4 in the Logical Partition
Configuration screen. Move the cursor over the LPAR that you want to
deactivate on the displayed sub-screen and press Enter.
How to reactivate an LPAR
Note:
• LPAR reactivation is equivalent to server restarting. So, care is necessary
in performing this operation. Especially, if this operation is performed
during data access (such as during start of a guest OS), a disk may be
damaged. You are strongly recommended to restart the guest OS instead
of reactivation.
• When a guest OS operating on an LPAR is rebooted by the operation on
the guest OS, the guest OS might be hang up in the final process. In such
a case, reactivate the LPAR. (Then, the connection between an LPAR and
a disk is disconnected. So, the disk is not broken down.)
This reactivation operation works only on LPARs that are activated.
Move the cursor over the 'Sta' column of the 'LPAR' row that you want to
reactivate, and press Enter. Move the cursor over "Reactivate" on the
displayed sub-screen and press Enter.
You can also reactivate an LPAR by pressing F5 in the Logical Partition
Configuration screen. Move the cursor over the LPAR that you want to
reactivate on the displayed sub-screen and press Enter.
How to change scheduling modes of an LPAR
Place the cursor on the intersection between the LPAR line to change the
scheduling mode and 'Scd' column, and press Enter to display a sub-screen.
Type a scheduling mode to configure, and press Enter on the sub-screen.
You can change scheduling modes between Dedicated and Shared
dynamically without deactivating the LPAR. If one of the following conditions
is met, however, an error message will appear to terminate the screen.
• Sufficient physical processors do not exist for assigning all logical
processors in shared mode to the groups assigned to the LPAR, when the
shared mode is dynamically changed to the dedicated mode.
• A physical processor, not belonging to the LPAR group, is included in the
physical processor assignment on the Logical Processor Configuration
screen, when the shared mode is dynamically changed to the dedicated
mode.
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Hitachi Compute Blade 500 Series Logical partitioning manager User's Guide
Operation by LPAR manager Screen