Data Domain: NVRAM Remote Battery Failure Alert (NVRAM-00202)

Summary: This article explains the cause and resolution of the NVRAMRemoteBatteryFailure alert (Event ID: EVT-NVRAM-00202) on Data Domain systems; This alert indicates a critical hardware fault with the NVRAM remote battery, which must be resolved before the file system can be accessed. ...

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Symptoms

  • Event ID: EVT-NVRAM-00202
    • Alert: NVRAMRemoteBatteryFailure
    • Message: "A hardware fault was detected with an NVRAM remote battery and it may need to be replaced."
  • Filesystem is down with NVRAM alerts posted.

Example:

  • Alert ID:          EVT-NVRAM-00202
Severity:         Critical
Class:             hardwareFailure
Object:            Slot=%s
Info:                Cause=%s (see list below)

Message:         A hardware fault was detected with an NVRAM remote battery and it may need to be replaced

Description:     The remote battery for an NVRAM card is not in an usable state. The file system cannot be accessed until the fault is corrected or the NVRAM remote battery is replaced.

APPLIES TO

  • All Data Domain systems

Cause

This alert is triggered when the system detects that the NVRAM remote battery is unreliable or unusable. The specific cause is detailed in the alert message (Info: Cause=). Possible causes include:

  • Unable to retrieve NVRAM battery status
  • Battery not detected
  • Battery not charging
  • Voltage levels critically high:
    • Battery 1 voltage: High Critical
    • Battery 2 voltage: High Critical
    • Battery 3 voltage: High Critical
  • Multiple battery failures detected

Resolution

      To resolve the issue:

      1. Inspect physical connections:

        • Ensure all cables between the NVRAM card, and the remote battery are securely connected.
        • Verify that the power cable from the system to the remote battery unit is properly seated.

      2. Replace faulty components:

        • If any cables are damaged or defective, replace them.
        • If all connections are intact and the alert persists, replace the remote backup battery unit.

      Affected Products

      PowerProtect Data Manager Appliance, Data Domain, PowerProtect Data Manager
      Article Properties
      Article Number: 000042368
      Article Type: Solution
      Last Modified: 17 Apr 2026
      Version:  6
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