Failed Battery

What Caused the Problem?

The battery in the controller canister has failed or has reached its expiration date. The Recovery Guru Details area provides specific information you will need as you follow the recovery steps.

Caution
Do not perform these recovery steps if you have just turned on the storage subsystem or replaced a controller. During these two situations, the battery's self-test diagnostics take approximately 12 to 15 minutes to complete (depending on the controller type and whether the batteries were discharged). Until the diagnostic test is completed, you may see a Recovery Guru failure for a battery that is operational and fully charged.

Caution
Electrostatic charges can damage sensitive components. Use a grounding wrist strap or other anti-static precautions before removing or handling components.

Important Notes

Recovery Steps

1

If...

Then...

Your storage subsystem has one controller or you are not running a host-based, multi-path failover driver on all hosts connected to this storage subsystem

a

Stop all I/O to this storage subsystem.

b

Go to Step 2.

Your storage subsystem has two controllers and you are running a host-based, multi-path failover driver on all hosts connected to this storage subsystem.

a

Highlight the controller containing the failed battery in the Physical View of the Subsystem Management Window.

b

Select Controller>>Place>>Offline.

c

Select Yes in the Place Offline confirmation window.

d

Go to Step 2.

2

Remove the controller canister. Battery replacement may involve replacing the individual battery or the entire controller canister. Consult your hardware documentation for details.

Note: Before you insert a new controller canister into a Directly Managed Storage Subsystem (refer to the Network Management Type column in the Enterprise Management Window), you must update the DHCP/BOOTP server so that it will associate the new controller's hardware Ethernet address with the host name and IP address previously assigned to the removed controller.

To update the DHCP/BOOTP server, find the entry associated with the removed controller and replace its Ethernet address with the new controller's Ethernet address. The controller's Ethernet address is located on an Ethernet ID label on the controller canister in the form xx.xx.xx.xx.xx.xx. If you need more details, consult the Storage System Planning Guide.

3

Record the installation date (today's date) and the new replacement date (according to the battery's warranty) on the battery label located on the controller canister containing the new battery.

4

Insert the controller canister (containing the new battery) securely into place.

5

Select the Components button on the controller enclosure in the Physical View of the Subsystem Management Window. Then, set the battery age to zero by selecting the Reset button associated with the controller canister containing the new battery.

6

If...

Then...

You placed the controller offline in Step 1

a

Highlight the offline controller in the Physical View of the Subsystem Management Window.

b

Select Controller>>Place>>Online.

c

Select Yes in the Place Online confirmation window.

d

Locate the Automatic Logical Drive Transfer (ADT) entry in the Storage Subsystem Profile. To open the profile, select View>>Storage Subsystem Profile from the Subsystem Management Window.

If...

Then...

There are hosts mapped to logical drives on this storage subsystem that have an ADT status of disabled

OR

There are hosts mapped to logical drives on this storage subsystem that are not running a host-based, multi-path failover driver

It may be necessary to redistribute the logical drives to their preferred controller. If the Subsystem Management Window's Storage Subsystem>>Redistribute Logical Drives menu option is visible, select the option.

Note: If you have a mix of hosts with ADT enabled and ADT disabled, all logical drives will be immediately assigned back to their preferred path. However, until the host-based, multi-path failover driver detects the valid preferred path (may take several minutes), the logical drives mapped to the ADT-enabled hosts may get temporarily returned back to the non-preferred path.

If the menu option is not visible, the logical drives are already associated with their preferred controllers and no action is needed.

Go to Step 7.

There are NO hosts mapped to logical drives on this storage subsystem with an ADT status of disabled

AND

All hosts mapped to logical drives on this storage subsystem are running a host-based, multi-path failover driver

No action is required.

If logical drives need to be redistributed to their preferred controller, the host-based, multi-path failover driver will automatically initiate the transfer.

Note that detection of a restored preferred path by the multi-path failover driver can take several minutes.

Go to Step 7.

You did not place the controller offline in Step 1

Go to Step 7.

7

Wait approximately 12 to 15 minutes for the battery to recharge; then, select Recheck to rerun the Recovery Guru to ensure that the failure has been fixed.