Articles
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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.
Updated: May 28, 2026
ID: 000018053
This health check tool is designed to triage common and performance issues reported for DDVE system.
Updated: May 26, 2026
ID: 000200529
Dell PowerProtect Data Domain remediation is available for multiple security vulnerabilities that could be exploited by malicious users to compromise the affected system.
Updated: May 29, 2026
ID: 000376224
This article provides information describing the contents of the "Streams" section of the system show performance command output.
Updated: May 29, 2026
ID: 000004019
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.
Updated: May 29, 2026
ID: 000453071
How to collect the CDRA and CDRS components for troubleshooting purposes.
Updated: May 29, 2026
ID: 000019750
How to reset or regenerate certificates due to expiration (or misconfiguration).
Updated: May 29, 2026
ID: 000188770
Dell PowerProtect Data Domain remediation is available for multiple security vulnerabilities that could be exploited by malicious users to compromise the affected system.
Updated: May 28, 2026
ID: 000348708
Support bundle generation taking excessively long, which may cause issues if integrated with DLm systems.
Updated: May 28, 2026
ID: 000059768
Data Domain destination system configured with MTREE replication may report higher usage if the source system has fastcopy files in the same MTREE.
Updated: May 28, 2026
ID: 000058603
DD Boost, NFS, and VTL protocols are disabled, and not able to reenable.
Updated: May 28, 2026
ID: 000053743
This Article describes how to implement the Data Domain snapshot feature with NetWorker to provide protection against accidental deletions or data loss.
Updated: May 27, 2026
ID: 000468576
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
Updated: May 27, 2026
ID: 000026659
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.
Updated: May 27, 2026
ID: 000045237
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.
Updated: May 27, 2026
ID: 000211676
Prediction Enabled Automatic Cleaning is run only when its prediction engine determines whether used capacity exceeds a configured percentage within a configured time.
Updated: May 27, 2026
ID: 000199927
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.
Updated: May 27, 2026
ID: 000060425
This article explains cloud tier cleaning and garbage collection for long term retention in DDOS 6.0 and later, including how cloud units operate, how cleaning is scheduled, throttled, and triggered, and the differences between active tier and cloud tier cleaning processes.
Updated: May 27, 2026
ID: 000019165
An issue was identified on cloud Data Domain Virtual Edition (DDVE) using an Active Tier on Object Store (ATOS) configuration. The issue is caused when a DDVE has more than one active capacity license subscription assigned to the DDVE, but one of them is expired.
Updated: May 26, 2026
ID: 000200614
This article provides estimates on scheduling lead time when booking Remote Proactive Services (RPS) upgrades.
Updated: May 26, 2026
ID: 000021599
This article answers common questions about Data Domain licensing, including electronic licensing (ELMS), license management, and deployment using Software License Central.
Updated: May 26, 2026
ID: 000020788
This document serves to help with identifying the error or and fault and provide a resolution path.
Updated: May 26, 2026
ID: 000204330
Garbage Clean(GC) process is unavailable during copy phase on system that is configured with Cloud tier on Dell EMC ECS Object Storage and cannot be cancelled. It will also prevent starting GC process on Active Tier.
Updated: May 26, 2026
ID: 000196150
This article explains how support for newly introduced regions can be added for already supported and qualified Cloud Tier providers on Data Domain systems.
Updated: May 26, 2026
ID: 000193955
DataDomain clean (GC) is scheduled to run on particular days and times. In more recent DDOS versions, when there is any such schedule and, for any reason, the clean process cannot be started, this is noticed by the system monitoring daemon, which raises an alert.
Updated: May 26, 2026
ID: 000052147
This article describes how to migrate AWS Elastic Block Store (EBS) volume from gp2 to gp3 type for Data Domain Virtual Edition (DDVE) appliance deployed in AWS cloud platform.
Updated: May 26, 2026
ID: 000192086
Data Domain Virtual Edition (DDVE) system upgrade fails with filesystem shutdown error.
Updated: May 26, 2026
ID: 000185767
This article describes error messages which may be displayed on Data Domain Restorers (DDRs) when creating a mtree or listing mtree options as a user with a limited-admin role.
Updated: May 26, 2026
ID: 000064278
Data Domain Virtual Edition (DDVE) deployed in Microsoft Azure Cloud requires an operating disk, NVRAM disk, and as many metadata disks as necessary for storing backups. However, initially after deployment and with no storage manually added, a "System" disk appears which is not for DDVE, the operating system, or the NVRAM.
Updated: May 25, 2026
ID: 000215391
This article explains an implementation detail when ECS is used with Data Domain for Cloud Tier. It addresses potential misunderstandings when reviewing the Data Domain and ECS logs.
Updated: May 25, 2026
ID: 000216319