IBM iSeries 270 - Expansion Unit Power Procedure

If you cannot use these methods, you can power off the system by using the procedure “Control panel
power button” on page 562.
Note: For consoles on the Primary partition that run iSeries Access, a delayed power-off operation by
using the PWRDWNSYS command is required. You must stop all applications, including console applications,
and subsystems that are running in all logical partitions, before the delayed power-off operation is
complete.
Attention: Using the control panel power push-button to power off the system may cause unpredictable
results in the data files, and the next IPL will take longer to complete.
Power off a secondary partition: Attention: Powering off a secondary partition will not power off any
expansion tower(s) that the partition owns. If it is necessary to power off the expansion tower(s) owned by
the secondary partition, use the “Expansion unit power procedure.” Power off the secondary partition(s)
before powering off the expansion tower(s) owned by the logical partition(s).
Choose one of the following:
v If the secondary partition is operating under Dedicated Service Tools (DST), power off the logical
partition by selecting Power Off the System on the Start a Service Tool (SST) display of the secondary
partition’s console.
Note: To locate the secondary partition’s console or alternative console, see Locating a secondary
partition’s console in the iSeries Service Functions
.
v If the secondary partition is operating under OS/400, from the logical partition’s console enter the
PWRDWNSYS command to power off the secondary partition.
Note: For consoles on the secondary partition that run iSeries Access, a delayed power-off operation by
using the PWRDWNSYS command is required. You must stop all applications, including console
applications, and subsystems that are running in the secondary partition before the delayed power-off
operation is complete.
v If the secondary partition fails to power off or if the console of the secondary partition is not functioning:
1. Go to the console of the Primary partition.
2. From the Use Dedicated Service Tools (DST) display, select Work with System Partitions —>
Work with Partition Status —> Power off Delayed. Press Enter.
3. If the secondary partition fails to power off, then go to “Power off a system with multiple logical
partitions using the Control Panel or primary partition’s console” on page 563 in this page.
Expansion unit power procedure
For use by authorized service providers.
Use this procedure only to power off an expansion tower or unit when you are performing one of the
following:
v Removing or replacing a failing part within an expansion tower or unit.
v Adding, moving, removing, or replacing a failing item within an expansion tower or unit.
Do not use this procedure on the system unit or the system unit’s integrated expansion unit. For system
units and system unit integrated expansion units use the “Power on/off the system and logical partitions”
on page 561 procedure.
Do not use this procedure to replace disk units that are supported under device concurrent maintenance.
Use device concurrent maintenance instead.
564 Hardware (Remove and Replace; Part Locations and Listings)