IBM AS/400e User manual

AS/400e
Logical Partitions:
Managing
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AS/400e
Logical Partitions:
Managing
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© Copyright International Business Machines Corporation 1998,2000. All rights reserved.
US Government Users Restricted Rights – Use, duplication or disclosure restricted by GSA ADP Schedule Contract
with IBM Corp.

Contents
Part 1. Managing logical partitions.......................1
Chapter 1. Controlling logical partitions with DST and SST ................3
Starting SST and DST for logical partitions .......................4
Chapter 2. Displaying and printing logical partition information ..............7
Displaying logical partition status ...........................7
Displaying logical partition processing configuration ....................8
Displaying allocated I/O resources for logical partitions ...................9
Displaying available I/O resources for logical partitions...................10
Displaying system I/O resources for logical partitions ...................10
Displaying logical partition release levels ........................11
Displaying communication options for logical partitions...................12
Displaying reference code history for secondary partitions .................12
Printing system configuration for logical partitions.....................13
Chapter 3. Restarting and powering down a system with logical partitions .........15
Changing logical partition power schedule .......................15
Powering down a system with logical partitions .....................15
Restarting a system with logical partitions .......................16
Changing operating mode for a logical partition .....................17
Changing the IPL source for a logical partition ......................18
Restarting a secondary partition on system IPL .....................18
Holding a secondary partition from restarting on system IPL.................19
Chapter 4. Changing logical partition processing resources ...............21
Changing logical partition interactive performance ....................21
Changing logical partition main storage ........................22
Changing logical partition processors .........................23
Chapter 5. Changing logical partition configuration...................25
Changing a secondary partition name .........................25
Changing bus ownership type for logical partitions ....................25
Changing and switching I/O resources.........................26
Removing I/O resources for logical partitions .....................26
Adding I/O resources for logical partitions ......................28
Switching I/O processors for logical partitions .....................28
Changing a logical partition load source resource.....................29
Changing a logical partition console resource ......................30
Selecting or changing an alternate IPL resource for logical partitions .............30
Selecting or changing default electronic customer support resource for logical partitions ......31
Installing new hardware for logical partitions ......................31
Adding a new logical partition ............................31
Changing communication options for logical partitions ...................34
Deleting a secondary partition ............................34
Chapter 6. Managing security for logical partitions ...................35
Chapter 7. Installing program temporary fixes on a system with logical partitions.......37
© Copyright IBM Corp. 1998,2000 iii
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iv AS/400e: Logical Partitions: Managing

Part 1. Managing logical partitions
When you create logical partitions, you essentially create two or more smaller logical AS/400 systems.
Each logical partition has its own processors, input/output (I/O) devices, Licensed Internal Code, operating
system, and optional software applications.
For these reasons most of the tasks you perform on each individual logical partition are the same as on a
system without logical partitions. In other words, you should approach each logical partition as an
independent system.
The following list contains the information and tasks you will need to manage a system with logical
partitions:
vControl your logical partitions by using dedicated service tools (DST) or system service tools (SST).
vDisplay and print logical partition information.
vRestart and power down your partitioned system (initial program loads).
vChange processing resources to improve system performance.
vChange the configuration of a logical partition.
vManage security on your system.
vInstall program temporary fixes to keep your software current.
For more information on logical partitions, go to Learning about Logical Partitions. Go to the Backup and
Recovery pages for information on backing up your system.
Refer to the book, AS/400 Basic System Operation, Administration, and Problem Handling for more
information about starting and managing your system.
© Copyright IBM Corp. 1998,2000 1

2AS/400e: Logical Partitions: Managing

Chapter 1. Controlling logical partitions with DST and SST
On a system without logical partitions, you can use the control panel to perform many tasks. However, for
systems with logical partitions, secondary partitions do not have physical control panels. To control your
logical partitions you can use menu options in dedicated service tools (DST) and system service tools
(SST). These menu options act as a virtual control panel.
Security considerations
You can restart and reconfigure logical partitions from the primary partition by using DST. Therefore, an
unqualified person with access to DST could unintentionally cause severe damage to your system. For this
reason you should limit the number of people who have the password to DST and who have access to the
control panel.
DST versus SST
You control logical partitions essentially the same way in DST and SST. You can perform some logical
partition configuration actions only in DST. However, since SST is easier to access than DST, you should
use SST whenever possible.
To use SST or DST go to Starting SST and DST.
This table describes the capabilities that are available to logical partitions from the Work with system
partitions display (option 11, DST), or (option 5, SST).
Primary Partition Secondary Partition
DST Display all logical partition information
Change IPL status on primary and secondary logical
partitions
Change operating mode on primary and secondary logical
partitions
Perform main store dumps
Power on or off primary and secondary logical partitions
Change processing and I/O configuration of primary and
secondary logical partitions
Perform recovery functions for secondary partitions
Create and delete secondary partitions
Display its own logical partition
information
Perform limited recovery functions on
itself
When the secondary partition is not in
secure mode it can:
vChange IPL status on itself
vChange operating mode on itself
vPerform main store dumps on itself
vPower itself off
SST Display all logical partition information
Change I/O configuration of primary and secondary partitions
When the system is not in secure mode it can:
vChange operating mode
vChange logical partition status
vPerform main store dumps
vPower on and off secondary partitions
vForce DST on the primary partition or secondary partitions
Display its own logical partition
information
When the secondary partition is not in
secure mode it can:
vChange IPL status on itself
vChange operating mode on itself
vPerform main store dumps for itself
vPower itself off.
vForce DST on itself
© Copyright IBM Corp. 1998,2000 3
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Starting SST and DST for logical partitions
Starting SST on the primary partition or a secondary partition
You can start system service tools (SST) by typing the start system service tools (STRSST) command and
pressing Enter at a command line. You can start SST on any primary or secondary partition workstation.
You must have proper authority to use this command.
Starting DST on the primary partition
When you start dedicated service tools (DST), make sure that the primary partition console is at a sign on
display to prevent jobs from ending abnormally. As an alternative, you can perform the following steps on
the logical partition. You only need to perform these steps once since they system maintains changes
across initial program loads (IPLs):
1. At a command line, type the Work with System Value (WRKSYSVAL) command.
2. Set the QDEVRCYACN system value to *ENDJOBNOLIST or *ENDJOB.
3. Set the QDSCJOBITV system value to 5 minutes.
For more information on system values, see the System Values chapter of OS/400 Work Management.
To start DST on the primary partition use the system control panel to put the system in manual mode and
select option 21. The system will prompt you for the DST user ID and password.
Starting DST on a secondary partition from DST on the primary partition
Follow these steps to start dedicated service tools (DST) on a secondary partition:
1. Start DST on the primary partition.
2. Select option 11 (Work with system partitions).
3. Select option 2 (Work with partition status).
4. Use your cursor to select the secondary partition for which you want DST.
5. Select option 10 (Mode manual) if the secondary partition is not already in manual mode.
6. Press F23 for more options.
7. Select option 21 (Force Dedicated Service Tools). The secondary partition console will experience a
device I/O error and end abnormally. This is normal.
8. The DST display will appear on the workstation that is acting as console for the secondary partition.
Sign on to DST.
9. Before you leave DST, set the secondary partition back to normal mode if you want the next IPL to be
unattended.
Forcing DST from SST
You can force DST to start from SST if the logical partition is not in secure mode. On the primary partition,
you can force DST for itself or any of the secondary partitions. On a secondary partition you can force
DST to start on itself.
When you force DST from the system control panel of the Work with Partition Status display, you cancel
the current job on the partition console.
Note: If you perform an IPL on the logical partition before you exit DST, the next OS/400 IPL will be
abnormal. To avoid an abnormal OS/400 IPL, exit DST before you perform the IPL. Then sign on to
that logical partition and perform the IPL.
4AS/400e: Logical Partitions: Managing
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