Data Domain

This document highlights minimum, recommended, and latest code versions for Dell Technologies Enterprise and Data Center Infrastructure products. Dell carefully evaluates and monitors code deployment data to ensure that product releases meet our stringent expectations to provide our customers with reliable products and solutions.

This document highlights minimum, recommended, and latest code versions for Dell Technologies Enterprise and Data Center Infrastructure products. Dell carefully evaluates and monitors code deployment data to ensure that product releases meet our stringent expectations to provide our customers with reliable products and solutions.

When a DDOS upgrade is performed on version 8.7 or earlier, the RPM signature check may fail with the error message: RPM ".rpm file" signature is invalid.

This article explains how to enable the Data Domain Boost (DD Boost) plugin logging when troubleshooting issues related to Boost and BoostFS. This is called a precert log.

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.

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.

When using BoostFS, file access time (atime) updates may fail when the Linux client issues a touch -a command. This behavior is related to the client-side FUSE libraries, where some versions do not pass the atime modification request, requiring touch -am as a workaround to update both atime and mtime.

Data Domain systems can experience sustained high CPU utilization despite low backup, replication, or application workload when large volumes of BoostFS READDIR/OSTREADDIRPLUS requests are generated. Historical investigations have shown that automated indexing, scanning, monitoring, and file system traversal processes operating against BoostFS mount points can significantly increase DDFS and system CPU utilization, resulting in elevated load averages and degraded performance.

Data Domain currently supports SMB dialects up to SMB 2.1 and does not support SMB3. Clients configured to require SMB3, including Windows Server 2025 systems with an SMB3-only configuration, will be unable to connect to Data Domain CIFS shares because SMB negotiation cannot be completed.

DDOS precheck fails because of an old certificate in the trust chain.

Summary: This document details the steps to register/add a Data Domain System to Secure Connect Gateway while using connectemc.

After upgrading to DDOS 8.5 or later, SupportAssist configuration may fail with the error "Unable to load JSON parser".

This article outlines the procedure for performing an offline firmware update on Aries-KP model drives (HUS72604CLAR3000 and HUS72604CLAR4000) from version N9C0 to NE70.

This article expands on Active Directory integration for Dell Data Domain systems by providing commonly used CLI commands for domain joins, OU placement, authentication configuration, domain verification, access management, CIFS share considerations, and advanced troubleshooting. It serves as a command-reference companion to the primary Active Directory guide and includes examples and best practices for validating and maintaining Active Directory connectivity.

MREPL ASSOC failed, Dest Mtree must not exist for initialization

This KB describe behavior of DDFS disabled due to platform critical condition.

This article helps diagnose issues with Dell or third-party products using the DD Boost library and DD Boost over Fibre Channel in supported Linux/UNIX environments.

Dell PowerProtect Data Domain remediation is available for multiple security vulnerabilities that could be exploited by malicious users to compromise the affected system.

This article provides estimates on scheduling lead time when booking Remote Proactive Services (RPS) upgrades.

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.

This article describes how to identify and resolve memory-related errors on Dell Data Domain systems.

HA pair with Retention Lock Compliance Enabled shows degraded status with SMS mirroring failing; logs contain iDRAC HTTP 500 “Failed to fetch iDRAC users, unable to update privilege”. The cause is an iDRAC stability issue that prevents user enumeration, leading HA to mark SMS as failed.

This article outlines how to access and view Data Domain Licenses and Certificates activated from Transformational License Agreements (TLA).

Filesystem encountered an error and restarted with error "Failed to restore seeding resume context" in the logs.

Using both NFS and CIFS protocols can lead read or write issues.

Data Domain Restorers (DDRs) run a proprietary file system known as the Data Domain File System (DDFS). Due to how DDFS stores data and corresponding metadata, there are limits on the maximum number of files that can be stored in a single directory. Exceeding these limits can cause degraded performance, timeouts, and system instability. This article explains the directory file limits, the technical reason for the limits, and the risks when limits are not adhered to.

In DDOS 8.5 and 8.6, an internal defect can cause SupportAssist to appear configured but not fully registered after an upgrade. This issue triggers a mandatory contact information pop-up in the Data Domain System Manager (DDSM) GUI, preventing access to standard management pages.

The UI becomes unresponsive and RPM uploads fail because the iDRAC does not supply Secure Boot entries in host_bios.json, causing the sms_system_get_secure_boot API to error.

Data Domain customers must not modify SNMP or other configuration settings within iDRAC. Data Domain uses iDRAC SNMP internally for platform hardware monitoring and alert processing, and customer changes can interfere with expected system behavior, generate support inquiries, and are not supported by Dell Support.

This article describes what Session Security is on Avamar, how it works, and how to manage it.