Replacing the CPU module

About replacing the CPU module

Replacing the CPU module consists of the following procedures:

Location of the CPU module and blank filler module

The CPU module is at the center position on the back of your appliance. A clustered FAS270c has two CPU modules (or nodes) with Node A above Node B. On the nonclustered FAS270, a blank filler module is in the top position directly above the bottom CPU module. Both modules use the same cam mechanism levers to remove and install the module.

Caution
Both modules must be in place during operation to ensure proper airflow through the appliance.

CPU module contents

The CPU module contains the system motherboard, CPU, memory DIMM, CompactFlash^TM card (underside), battery pack, and other system components.

Reasons for removing the CPU module

There are several reasons for removing the CPU module:

Replacement of a defective CPU module
Replacement of the SDRAM DIMM
Accessing the CompactFlash card
Accessing the system battery and connection to the motherboard
Appliance upgrade and conversion options

Removing the CPU module

To remove the CPU module, complete the following steps.

Step	Actions
1	If you are performing...	Then...
	A planned CPU module replacement on a nonclustered FAS270	Shut down the appliance by entering the following command at the console: halt Caution Always use the `halt` command to perform a clean shutdown.
	An unplanned CPU module replacement on a nonclustered FAS270	If possible, shut down the appliance by entering the following command at the console: halt Caution Always use the `halt` command to perform a clean shutdown.
	A planned CPU module replacement on a clustered FAS270	Determine which module is to be replaced. From the partner CPU module, perform a takeover operation by entering the following command: `cf takeover`
	An unplanned CPU module replacement on a clustered FAS270, where the partner node performed a takeover	Proceed to Step 2.
	An unplanned CPU module replacement on a clustered FAS270, where the partner node did not perform a takeover	Proceed to Step 2.
2	Put on the antistatic wrist strap and attach the grounding leash to the appliance chassis.
3	Disconnect all cables to the CPU module that you are replacing.
4	At the rear-center of your appliance, using your thumb and index finger of both hands, press the cam mechanism levers in the middle of the CPU module to release it. The following figure shows how to release the cam mechanism.
5	Carefully pull the cam handle so that the CPU module slides out from the chassis. The CPU module has a travel distance of approximately 10 inches (25.4 centimeters).
6	If you are...	Then...
	Replacing a defective CPU module with a new one	Proceed to Moving the Data ONTAP software.
	Servicing a component on the CPU module	See the appropriate procedure in this chapter. Then proceed to Procedures for installing the CPU module.

Moving the Data ONTAP software

The Data ONTAP software is installed on the CompactFlash card of the old CPU module. The CompactFlash card on the replacement CPU module is blank. To get the correct version of Data ONTAP onto the replacement CPU module, you need to move the CompactFlash card from the old CPU module to the replacement CPU module.

To install the correct version of Data ONTAP onto the replacement CPU module, complete the following steps.

Step	Action
1	Put on the antistatic wrist strap and grounding leash.
2	On the bottom side of the old CPU module, remove the CompactFlash card. Use your thumb to apply pressure to the exposed surface of the card, while gently sliding the card out of the socket.
3	Repeat the same procedure by removing the CompactFlash card from the replacement CPU module.
4	Install the old CompactFlash card into the replacement CPU module by orienting the card so that the pin slots on the card engage properly with the pins inside the socket, and then gently sliding the card into place until it is firmly seated in the socket. Caution Damage to the card socket and card can result if you do not orient the card properly during insertion.
5	Install the blank CompactFlash card from the replacement CPU module into the old CPU module and return the old CPU module to NetApp.
6	Proceed to Procedures for installing the CPU module to install your replacement CPU module.