Replace a PCI adapter contained in a cassette in the system with the power on in Linux

You might need to replace a PCI adapter. Use the procedure in this section to perform this task.

You must have already completed the procedure Remove a PCI adapter contained in a cassette from the system with the power on in Linux in order to have the slot powered off.

Note: Use this procedure only when you are replacing an adapter with an identical adapter. If you are replacing an adapter with an adapter that is not identical to the adapter removed, go to Remove a PCI adapter contained in a cassette from the system with the power on in Linux and Install a PCI adapter contained in a cassette with the power on in Linux.

To replace an adapter with the power on in Linux, do the following:

Perform prerequisite tasks as described in Before you begin.
Take appropriate precautions for avoiding electric shock and handling static-sensitive devices. For information, see Avoiding electric shock and Handling static-sensitive devices.
If the adapter needs to be placed in the PCI adapter cassette, see Place a PCI adapter in a single-width cassette.
At the back of the system, lift the cassette cover flap and identify the cassette slot you want to use.
Ensure the lower cassette handle is pressed up toward the retainer clip. This places the adapter in the correct position to be docked in the system.
Run the drslot_chrp_pci command to enable an adapter to be replaced:
For example, to replace the PCI adapter in slot U7879.001.DQD014E-P1-C3 run this command:
```
drslot_chrp_pci -R -s U7879.001.DQD014E-P1-C3
```
Follow the instructions on the display to complete the task.

When you are instructed to insert the adapter in the adapter slot, lift and hold the PCI adapter EMC shield A in the open position. See Figure 1.
Slide the cassette C into the cassette slot as shown in the following figure.
When the cassette is fully inserted into the system, firmly press downward on the lower cassette handle B to lock the adapter in its connector.
Figure 1. PCI adapter cassette removed from the system unit
Lower the PCI adapter EMC shield A into the closed position, close the shield latch, then close the rear rack door.
Figure 2. PCI adapter EMC shield in the closed position
Run the lsslot command to verify that the slot is occupied.
For example, Enter lsslot -c pci -s U7879.001.DQD014E-P1-C3
The following is an example of the information displayed by this command:
```
# Slot          Description             Device(s)
U7879.001.DQD014E-P1-C3 PCI-X capable, 64 bit, 133MHz slot 0001:40:01.0 
```