Data Domain: Troubleshooting NVRAM Issues
Summary: This article provides links to some of the most referenced Dell Knowledge Base articles related to troubleshooting and diagnosing issues with Non-volatile random-access memory (NVRAM) hardware. ...
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Instructions
This article is a resolution path to the most common NVRAM failures.
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Symptoms & Linked Article: |
Summary: |
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Symptoms: NVRAM hardware failure, NVRAMHardwareFailure, EVT-NVRAM-00201
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This article describes the conditions that trigger the Event ID: EVT-NVRAM-00201 (NVRAMHardwareFailure) alert on Data Domain systems and outlines the required resolution steps. |
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Symptoms: NVRAM battery failure, EVT-NVRAM-00202, NVRAMRemoteBatteryFailure
Data Domain: NVRAM Remote Battery Failure Alert | NVRAM-00202 |
This article explains the cause and resolution of the alert Event ID: EVT-NVRAM-00202 (NVRAMRemoteBatteryFailure) 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: SDPM, iDRAC event code, SDPM alert, EVT-NVRAM-00201
Data Domain: How to Diagnose and Resolve SDPM | NVRAM Alerts |
This article provides a structured troubleshooting workflow, event-specific remediation guidance, and the most likely resolution for SDPM (NVRAM) events. |
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Symptoms: Reinitialize, SDPM, VOSS, Sanitize NVRAM, SDPM7108
Data Domain: How to Reinitialize and Sanitize SDPM | NVRAM |
This article describes how to sanitize and reconfigure Software Defined Persistent Memory (SDPM) settings in the BIOS and verify successful initialization after the system returns to DDOS. |
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Symptoms: EVT-FILESYS-00016, MSG-NV-00002, NVRAM recovery failed, filesystem will not start
Data Domain: Investigating EVT-FILESYS-00016 or MSG-NV-00002 NVRAM Recovery Failures
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This article describes how to investigate Data Domain filesystem startup failures caused by an inability to recover data from NVRAM. When the filesystem cannot replay NVRAM contents during startup, Data Domain posts alert EVT-FILESYS-00016 or MSG-NV-00002. |
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Symptoms: low NVRAM battery, discharged NVRAM battery, charge NVRAM battery, BBU
Data Domain: Charging NVRAM Batteries |
A Data Domain NVRAM battery may become partially discharged after replacement of the NVRAM card or Battery Backup Unit (BBU), or after the system has remained powered off for an extended period. |
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Symptoms: reboot loop, NVRAM driver, NVRAM initialization
Data Domain: Reboot loop at "NVRAM driver load and initialization" |
Data Domain systems have reported being stuck in a reboot loop. The NVRAM driver fails to load or initialize successfully resulting in a system reboot. |
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Symptoms: EVT-FILESYS-00015, NVRAM mismatch, filesystem fails to enable
Data Domain: Filesystem fails to enable with EVT-FILESYS-00015 | NVRAM Mismatch |
This article describes a condition where the Data Domain filesystem fails to start due to a potential NVRAM mismatch. It also provides a validated workaround to restore filesystem availability. |
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Symptoms: NVRAM failed, NVRAM faulty, BBU fault, NVRAM hardware error
Data Domain: NVRAM Failure Detected | Error or Faulty Condition
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The NVRAM and its Battery Backup Unit (BBU) are critical components of the Data Domain Data Invulnerability Architecture. The Data Domain Operating System (DDOS) monitors these components. If a hardware fault occurs, DDOS generates an alert that must be addressed immediately to maintain system integrity. |
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Symptoms: DD9910, HA degraded, nvram not ok, filesystem not enabled
Data Domain: DD9910 HA state is degraded and file system is not enabled with "nvram not ok" |
A Data Domain DD9910 High Availability (HA) system may report a degraded HA state and prevent the file system from being enabled. |
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Symptoms : replication disabled, NVRAM loss, replication resync failure
Data Domain: Replication Context is Disabled Due to Potential NVRAM Loss
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This article explains why a Data Domain replication resync may fail with the error "this context is disabled due to potential nvram loss" and provides the required steps to resolve the issue. |
Additional Information
- Useful DDOS-CLI Commands for NVRAM Troubleshooting:
alerts show currentfilesys statussystem show nvramsystem show nvram-detailed
Affected Products
Data DomainArticle Properties
Article Number: 000223826
Article Type: How To
Last Modified: 25 سبتمبر 2026
Version: 6
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