You might need to replace the cache battery pack. Use the procedure in this section to perform this task.

1. Ensure that the cache battery pack is in an error state before replacing it. This action will prevent possible data loss by ensuring that all cache data is written to disk before battery replacement. To force the cache battery pack into an error state, do the following steps on the system or partition that is using the adapters:
   1. Be sure that you are signed on to the system with at least service level authority.
   2. On the command line, type strsst. Press Enter.
   3. Type your service tools user ID and service tools password on the System Service Tools (SST) Sign On display. Press Enter.
2. Is the system or partition running have i Version 5 Release 4, or later?
   • Yes: Continue with the next step.
   • No: Go to step 4.
3. On the System Service Tools (SST) display, select Start a Service Tool. Press Enter.
   1. On the Start a Service Tool display, select Hardware Service Manager. Press Enter.
   2. On the hardware Service Manager display, select Work with resources containing cache battery packs. Press Enter.
   3. On the Work with Resources containing Cache Battery Packs display, select Force battery pack into error state for the I/O card. Press Enter.
   4. On the Force Battery Packs Into Error State display, verify that the correct I/O adapter has been selected and press the function key that confirms your choice.
   5. Return to the Work with Resources containing Cache Battery Packs display and select Display battery information. Verify that the Battery pack can be safely replaced field indicates yes. If it does not indicate yes, contact your next level of support before continuing this procedure.
   6. Continue with step 5.
4. On the System Service Tools (SST) display, select Start a Service Tool. Press Enter.
   1. Select Display/Alter/Dump.
   2. Select Display/Alter storage.
   3. Select Licensed Internal Code (LIC) data.
   4. Select Advanced Analysis.
   5. Select the BATTERY INFO command.
   6. On the Specify Advanced Analysis Options display, type -LIST in the Options field. Press Enter.
   7. Find and note the resource name of the adapter you are working with.
      Note: You can safely replace the cache battery pack when the display lists yes next to Battery pack can be safely replaced.
   8. Return to the Specify Advanced Analysis Options display. Type -Force -IOA xxxx where xxxx is the card resource name that you are working with and noted in the previous step. Press Enter.
   9. Follow the directions on the display to confirm forcing the cache battery pack into an error state.
   10. Return to the Specify Advanced Analysis Options display. Type -LIST -IOA xxxx, where xxxx is the card resource name that you are working with. Press Enter. The Battery pack can be safely replaced field should indicate yes.
5. Replace the cache battery pack by performing the following steps:
   CAUTION:
   The battery is a lithium ion battery. To avoid possible explosion, do not burn. Exchange only with the IBM-approved part. Recycle or discard the battery as instructed by local regulations. In the United States, IBM has a process for the collection of this battery. For information, call 1-800-426-4333. Have the IBM part number for the battery unit available when you call. (C007)

   Attention:

   • Attach a wrist strap to an unpainted metal surface of your hardware to prevent electrostatic discharge (ESD) from damaging your hardware.
   • When using a wrist strap, follow all electrical safety procedures. A wrist strap is for static control. It does not increase or decrease your risk of receiving electric shock when using or working on electrical equipment.
   • If you do not have a wrist strap, just prior to removing the product from ESD packaging and installing or replacing hardware, touch an unpainted metal surface of the system for a minimum of 5 seconds.
   1. Identify the correct adapter.
   2. Locate the metal cover  A  that contains the battery pack. Pull out the push rivet to release the metal cover  A  as shown in the following figure.
      
6. Disconnect the plug that connects the cache battery pack and the adapter. Squeeze the retaining latch while gently pulling on the plug. The plug connects to the board in only one way, so it cannot be inserted incorrectly during the replacement procedure.
7. Remove the cache battery pack by gently pulling it out of the adapter.
8. Install the new cache battery pack.
9. Connect the cache battery pack plug to the card. The plug only connects to the card in one way so that it cannot be inserted incorrectly during the replacement procedure.
10. Replace metal cover  A  and push in the push rivet to secure the cover to the adapter.
11. Does the system or partition have i Version 5 Release 4 or later?
    • Yes: Continue with the next step.
    • No: Go to step 14.
12. Return to the Work with Resources containing Cache Battery Packs display and select the Start IOA cache. Press Enter.
13. Verify the Cache was started message is received. This ends the procedure.
14. Return to the Specify Advanced Analysis Options display and type -START -IOA xxxx where xxxx is the card resource name that you are working with.
15. Ensure that the Cache started on IOA message is received.