vMake sure that the power cord is working and fully seated into the electrical receptacle and the power supply ac connector.

vReinstall the power-supply unit.

If these tasks do not solve the problem, contact your IBM technical-support representative.

20.Complete any remaining Recovery Guru procedures, if needed.

21.Check the status of each component in the storage subsystem.

22.Are any amber LEDs lit on any of the components?

vYes : Click Recovery Guru in the Subsystem Management window toolbar and complete the recovery procedure. If a problem is still indicated, contact your IBM technical-support representative.

vNo: Go to step 23.

23.Create, save, and print a new storage subsystem profile.

Replacing a battery

Each RAID controller in the DS3200 Storage Subsystem contains a rechargeable battery that maintains data in the cache memory for 3 days without power to the unit. The cache battery is the only type of battery in the DS3200.

Use the following procedure if the DS3000 Storage Manager software instructs you to replace the battery because the current battery has failed. You can also use the DS3000 Storage Manager software to check the status of the battery. Because write-caching is disabled when the battery fails, replace the failed battery as soon as possible to minimize any impact due to the disabling of the write-caching function.

The DS3200 storage subsystem controller cache battery timer is set to indicate when the battery is 2 years old. When the battery reaches 2 years of age, it does not mean that the battery has failed; but the battery might not be capable of maintaining cached controller data for up to 3 days in the event of a subsystem loss of power.

Attention:

1.If you are also removing the memory cache DIMM, do not start with this procedure; instead, follow the instructions in “Replacing a controller” on page 66.

2.When you handle static-sensitive devices, take precautions to avoid damage from static electricity. For details about handling static-sensitive devices, see “Handling static-sensitive devices” on page 19.

To replace a battery unit, complete the following steps.

1.Use the DS3000 Storage Manager software to print a storage subsystem profile.

2.Read the safety information that begins on page xi and “Best practices guidelines” on page 6.

3.Locate the RAID controller that contains the failed battery unit (see “Controller LEDs” on page 53).

Attention: Before you remove a controller in a single-controller DS3200, shut down the DS3200 to avoid data loss (see “Turning off the storage subsystem” on page 55).

Chapter 5. Replacing components 87

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IBM DS3200 Storage Subsystem manual Replacing a battery