Data Domain

Network File System (NFS) allows a system to share directories and files with others over a network. This article is helpful in verifying whether an NFS export is configured correctly. NFS configuration, mount options, and client configuration. Mounting and Verifying Exports on the NFS Client.

This health check tool is designed to triage common and performance issues reported for DDVE system.

ephemeral UDP port range usage.

This KB explains the value of IDRAC and how to configure it on most DD systems

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.

After upgrading the Data Domain Operating System (DDOS) from a pre-8.7 release to DDOS 8.7 or later, MTree replication contexts may fail to synchronize and continuously restart due to changes in SSL handling.

This article provides best practices to safely shut down or reboot Data Domain systems using the command-line interface (CLI) or user interface (UI). These practices help to ensure data integrity and system stability.

After upgrading to DD OS 8.6, the system repeatedly posts “New DD OS version available for upgrade” alerts; the alert logic reposts when release metadata changes, a side effect of one‑click upgrade.

Active Directory (AD) Authentication not working because the global catalog (GC) is disabled in Data Domain.

This KB article outlines troubleshooting steps to add Data Domain (DD) to PowerProtect DD Management Center (DDMC).

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

How to reset or regenerate certificates due to expiration (or misconfiguration).

This article outlines the certificate requirements for enabling the Cloud Tier feature on Data Domain systems using Google Cloud Storage. The guidance applies to systems deployed on physical hardware or on-premises virtual platforms running DDOS 6.2 or later.

This knowledge article provides a collection of frequently asked questions (FAQ) about Data Domain Data At Rest Encryption (DARE) in a consolidated location for ease of reference.

This document describes how to access the DD3300's console through iDRAC.

Starting with Data Domain releases from April 2026, updates have been introduced to iDRAC operator user behavior as part of Dell’s ongoing security enhancements. These updates help protect your system by preventing prolonged or unauthorized privileged access, while continuing to ensure full supportability. When maintenance that requires elevated access is necessary, Dell Support follows established and approved procedures and returns the system to a compliant and secure state once the work is complete.

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 information describing the contents of the "Streams" section of the system show performance command output.

This article explains how to reclaim storage space on Data Domain Virtual Tape Library (VTL) systems when using IBM i. Expiring a tape in IBM Backup, Recovery, and Media Services (BRMS) does not immediately free space on the Data Domain system. Additional steps are required to release the storage.

How to collect the CDRA and CDRS components for troubleshooting purposes.

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

Support bundle generation taking excessively long, which may cause issues if integrated with DLm systems.

Data Domain destination system configured with MTREE replication may report higher usage if the source system has fastcopy files in the same MTREE.

DD Boost, NFS, and VTL protocols are disabled, and not able to reenable.

This Article describes how to implement the Data Domain snapshot feature with NetWorker to provide protection against accidental deletions or data loss.

DD Boost protocol connection failures observed when using two-way-password authentication and using multiple connections in parallel in Data Domain Operating System (DD OS) version 6.1 and Data Domain Virtual Edition (DDVE) version 3.1

This article describes how to perform the disk rescan procedure on a Dell Data Domain system. The rescan operation manually polls all disk drives, forcing the system to reevaluate their state. While DDOS typically performs automatic scans, a manual rescan may be necessary if a replacement disk is not recognized.

When configuring an external key manager (KIMP), if trust between the DD and the KMIP server is through a chain of trust (KMIP certificate is not issued by a root CA, but by an intermediate CA), this cannot be properly configured from either the DD CLI or the UI.

Prediction Enabled Automatic Cleaning is run only when its prediction engine determines whether used capacity exceeds a configured percentage within a configured time.

The command "filesys show space tier active local-metadata" on applicable DDVEs does not match the total number of virtual disks assigned to the DDVE local metadata space.