Replacing the AT-FC or AT-FC2 module

About the AT-FC/AT-FC2

The AT-FC/AT-FC2 module controls the external disk shelf LEDs. The AT-FC/AT-FC2 is field-replaceable; however, it is not hot-swappable--you must power down the disk shelf before replacing the module. The AT-FC/AT-FC2 module communicates In-Band to the host system through its Fibre Channel port, which is connected to the backplane of the disk shelf.

Replacing the AT-FC/AT-FC2 consists of the following procedures:

Location of the AT-FC/AT-FC2

The AT-FC/AT-FC2 is plugged into the backplane at the back of the enclosure.

Removing an AT-FC/AT-FC2

To remove an AT-FC/AT-FC2 from a disk shelf, complete the following steps.

Step	Action
1	Put on the antistatic wrist strap and grounding leash.
2	Shut down the storage engine by entering the following command at the console: halt Caution Always use the `halt` command to perform a clean shutdown. The LCD on the storage engine displays `Halted` when the system is halted.
3	Turn off the power and remove the cables from the AT-FC/AT-FC2 on that disk shelf.
4	Press the levers on the CAM mechanism on the AT-FC/AT-FC2 to release it.
5	Carefully remove the AT-FC/AT-FC2 from the back side of the disk shelf and place it on a nonconductive/antistatic surface.
6	Go to Installing an AT-FC/AT-FC2.

Installing an AT-FC/AT-FC2

To install an AT-FC/AT-FC2 in a disk shelf, complete the following steps.

Step	Action
1	Put on the antistatic wrist strap and grounding leash, then check to make sure that the power is off to the storage engine and disk shelf.
2	Push apart the levers on the CAM mechanism and slide the AT-FC/AT-FC2 into the slot at the rear of the disk shelf, and then push the levers of the CAM mechanism into place. Caution Do not use excessive force when sliding the AT-FC/AT-FC2 into the disk shelf; you might damage the connector.
3	If you are hot-swapping...	Then...
	An AT-FC/AT-FC2 with like modules	Reconnect the Fibre Channel cabling.
	An AT-FC with an AT-FC2:
	If it is the first shelf in the loop where all other disk shelves have AT-FCs	Plug the optical SFP into the input port on AT-FC2. Reconnect the Fibre Channel cabling by using LC-to-LC cables when connecting to optical FC-AL adapters. Use HSSDC2-to-SFP cables for connections between the disk shelf with AT-FC2 and the disk shelf with AT-FC.
	If it is the last shelf in the loop where all other disk shelves have AT-FCs If it is a shelf in the middle of the loop where all other disk shelves have AT-FCs	Use HSSDC2-to-SFP cables for connections between a disk shelf with AT-FC and a disk shelf with AT-FC2. Note Each AT-FC2 ships with one SFP-to-SFP cable and one HSSDC2-to-SFP cable. If the replacements are in the middle of the loop, you require two additional HSSDC2-to-SFP cables.

4	Turn on the power supplies and reboot the system.