Powering on an expansion unit

Provides procedures for HMC-managed and non-HMC-managed units.

Attention: Before beginning read this entire procedure. If there are procedural steps that cannot be performed at this time, the procedure must be delayed until a later time.

Attention: If the server is HMC-managed, the power off and power on functions must be performed using the Power On/Off Unit utility on the HMC. To use the Power On/Off Unit utility, do the following when instructed to in the procedure below:

In the navigation area, open the Service Applications folder.
Select Service Focal Point.
In the contents area, select Service Utilities.
In the Service Utilities window, select the system you are working on.
Select Selected > Power On/Off Unit

If the server is not HMC-managed, the power off and power on functions must be performed using the Packaging Hardware Resources utility from the i5/OS® service partition. To use the Packaging Hardware Resources, go to the System Service Tools or the Dedicated Service Tools and do the following when instructed to in the procedure below:

Select Start a service tool
Select Hardware service manager
Select Packaging hardware resources
Select Concurrent maintenance

If the server is not HMC-managed and there is no i5/OS service partition, the expansion unit cannot be powered off and on with the server powered on.

Attention: Do not use this procedure to replace disk units that are supported under device concurrent maintenance. Use the device concurrent maintenance procedure instead.

Attention: Do not use this procedure on the system unit or the system unit's integrated expansion unit. For system units and system units integrated expansion units see Powering on and powering off

Note:

References to the console in this procedure refer to the console of the logical partition in which you are working.
Throughout this procedure, the term HSL I/O bridge is interchangeable with RIO adapter.
Throughout this procedure, the term tower is interchangeable with expansion unit.
Messages that may be generated on the HMC during the procedure refer to specific partitions by their partition IDs. A partition's ID is a numeric value that represents the order in which the partitions were created. The partitions listed in the Server Management content area are not necessarily listed in order of partition ID. A partition's ID is listed under the General tab in the Partition Properties.

Note: Perform the following with the assistance of the customer.

If the ac power cords were disconnected when the expansion unit was powered off and have not been reconnected, reconnect them now. If they are already connected go to step 2.
- The expansion unit will automatically power on when the ac power cords are connected.
- If this is a non-HMC-managed iSeries server, go to step 2.
- If this is an HMC-managed server, power off the expansion unit again. See Powering off an expansion unit. Then go to step 3.
Were you instructed to perform a function 69 to power on the expansion unit?
- No: Go to step 3.
- Yes: Perform function 69 (with the control panel set to manual mode) from the system unit control panel. See Control panel functions. Then go to step 4.
Power on the expansion unit using either the "Power On/Off Unit" utility from the HMC, or the "Packaging Hardware Resources" utility from the i5/OS service partition, as described at the top of this page. Follow the instructions provided by the utility to complete the power on. Go to step 4.
Note: If you are required to do this step using the Packaging Hardware Resources utility from the i5/OS service partition, but the Packaging Hardware Resources utility cannot be accessed, you may be able power on the expansion unit using the system control panel as follows.
- With the control panel set to manual mode, select function 07 and press Enter.
- Increment to A1 and press Enter. This will send out a Rack Power On command on the SPCN which will restore power any expansion unit that is powered off.
- See Control panel functions for further information on control panel functions and how to use them.
Wait for I/O resources in the expansion unit to be brought back online to a functional state, then go to step 5.
It may take between five and ten minutes after the expansion unit is powered on for i5/OS resources in the expansion unit to return to a functional/operational state. Using the Packaging Hardware Resources and Logical Hardware Resources utilities in the Hardware Service Manager utility, you can determine when resources in the expansion unit return to a functional/operational state by observing the transition of the resources from non-reporting (designated by a "?" next to the resources) to reporting (designated by the absence of a "?" next to the resources) and/or Unknown, Not Connected, Failed, or Disabled status to Operational status. If there is a disk unit attention SRC in the partition operator panel and the Hardware Service Manager is not available, the transition to functional/operational has occurred when the disk unit attention SRC disappears and the partition resumes normal operation.
Work with the customer to restart all I/O bus activity that was ended when the expansion unit was powered off, then go to step 6
- In i5/OS partitions:
  - Work with the customer to vary on all configuration descriptions (ctl, device, line, network server, etc.) that were varied off when the expansion unit was powered off. This can be done using the vrycfg command.
  - Start all subsystems that were ended when the expansion unit was powered off.
- In AIX partitions:
  - Work with the customer to configure all logical resources that were unconfigured when the expansion unit was powered off. This can be done using the cfgmgr command.
If you moved the ac power cords of an expansion unit from this expansion unit to an alternate ac power source when this expansion unit was powered off, then move them back to this expansion unit now. Move only one of the expansion unit's ac power cords at a time to prevent the expansion unit from losing ac power. Then go to step 7.
If the expansion unit was configured as switchable when you powered off the expansion unit, and you changed the mode to private, work with the customer to restore the mode of the expansion unit to switchable using Switching the mode of a tower's switchable resources. Then go to step 8.
If you ended Cluster Resource Groups (CRGs) when you powered off the expansion unit, work with the customer to start the CRGs. Then go to step 9.
If ownership of the expansion unit's HSL I/O bridge was changed when the expansion unit was powered off, work with the customer to restore the desired ownership. Return to the procedure that sent you here.