Prepare To Replace De2000H Or De4000H Battery; About This Task; Before You Begin; Place Controller Offline (Duplex) - Lenovo ThinkSystem DE Series Manual

• A management station with a browser that can access ThinkSystem System Manager for the
controller. (To open the System Manager interface, point the browser to the controller's domain
name or IP address.)

2.2. Prepare to replace DE2000H or DE4000H battery

Follow this procedure to prepare for a battery replacement in the DE2000H or
DE4000H storage array.

2.2.1. About this task

Each controller canister includes a battery that preserves cached data if the AC power fails. If the
Recovery Guru in ThinkSystem System Manager reports either a Battery Failed status or a Battery
Replacement Required status, you must replace the affected battery.

2.2.2. Before you begin

• Verify that no volumes are in use or that you have a multipath driver installed on all hosts using
these volumes.
• Review the
Requirements for DE2000H or DE4000H battery

2.2.3. Place controller offline (duplex)

If you have a duplex configuration, you must place the affected controller offline so you can safely
remove the failed battery. The controller that you are not placing offline must be online (in the
optimal state).

Perform this task only if your storage array has two controllers (duplex
configuration).
Steps
1. From ThinkSystem System Manager, review the details in the Recovery Guru to confirm that
there is an issue with a battery and to ensure no other items must be addressed first.
2. From the Details area of the Recovery Guru, determine which battery to replace.
3. Back up the storage array's configuration database using ThinkSystem System Manager.
If a problem occurs when you remove a controller, you can use the saved file to restore your
configuration. The system will save the current state of the RAID configuration database, which
includes all data for volume groups and disk pools on the controller.
◦ From ThinkSystem System Manager:
a. Select Support › Support Center › Diagnostics.
b. Select Collect Configuration Data.
replacement.
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