Removing the CMOS battery: 2145-DH8

You might have to remove the system-board CMOS battery from a SAN Volume Controller 2145-DH8 node.

Before you begin

DANGER

Multiple power cords. The product might be equipped with multiple power cords. To remove all hazardous voltages, disconnect all power cords. (L003)

or

or

CAUTION:

If your system has a module containing a lithium battery, replace it only with the same module type made by the same manufacturer. The battery contains lithium and can explode if not properly used, handled, or disposed of.

Do not:

• Throw or immerse into water
• Heat to more than 100°C (212°F)
• Repair or disassemble

Dispose of the battery as required by local ordinances or regulations. (C045)

1. Follow any special handling and installation instructions that come with the replacement battery.
2. Read the safety information to which Preparing to remove and replace parts refers.
3. Follow the procedure in MAP 5350: Powering off a node to verify that hosts will not lose access to data in volumes before you power off the node.
4. Slide the node out on its slide rails to the fully extended position.

   You can accomplish most service actions when the node is fully extended from the rack on its slide rails. You can leave the Fibre Channel and Ethernet cables connected, if you are using the cable-management arm and if you are not removing the node from the rack. If the location of the node in the rack is too high or too low to work comfortably, you can remove the node from the rack.

5. When the node is completely turned off, disconnect the power cables.
6. Optional: If you must remove the node from the rack to work on it, perform the following procedure to remove all cables and remove the node from the rack:
   1. To make sure that you can replace all cables in the same ports from which they were removed, label the port position of each Fibre Channel and Ethernet cable; then remove all cables from the back of the node.
   2. Remove the node from the rack and place it on a flat, static-protective surface. See Removing a node from a rack.
7. Remove the top cover, as described in Removing the top cover: 2145-DH8.
8. Locate the battery on the system board, as shown by Figure 1.
   Figure 1. Location of the SAN Volume Controller 2145-DH8 CMOS battery holder

   
9. Remove the battery:
   1. Use a fingernail to press the top of the battery clip away from the battery. The battery pops up when released.
   2. Use your thumb and index finger to lift the battery from the socket, as shown in Figure 2.
      Figure 2. SAN Volume Controller 2145-DH8 CMOS battery holder

      
10. Recycle or discard the battery as instructed by local regulations.

    See the caution at the beginning of this topic for further instructions regarding handling the battery.