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.

Post Standard Support for PowerProtect Data Domain systems.

This KB provides some clarification on how Disk Staging works. There has been some confusion on how the feature works and how available space is used and reported when Disk Staging is enabled.

Explains why after deleting all files in the filesystem, running GC does not reclaim all space, against the customer expectations

The article explains why Data Domain pre‑comp values vary between commands or ASUP reports. Factors include BOOST with DSP, sparse VM disks, and tape‑recycle overwrites that affect byte accounting.

PowerProtect Data Domain systems use iDRAC for platform management, remote access, and hardware monitoring. Although iDRAC exposes numerous configuration options, not all settings are intended to be modified on Data Domain systems. This article identifies iDRAC configuration areas that are generally supported for administration and those that are not intended for modification because they may affect platform operation, monitoring, alerting, or supportability.

Avamar 19.1 backups to a Data Domain system can fail with the DDR_GET_AUTH_TOKEN error when more than 16 client hostnames or IP addresses are associated with a single token request, caused by a DDboost API limitation.

This article outlines how to fix the issue and reenable the file system when the Data Domain File System (DDFS) panics with the following PANIC string: PANIC: ddr/dm/dmbt_iface.c: dmbt_update_entry_nolock

This article provides detailed steps on how to install Data Domain Boost for NetBackup/BackupExec on a media server.

Excessive SNMP polling can overwhelm the Data Domain System Management Service (SMS), causing filesystem-related commands to fail with messages such as "The filesystem is unavailable at this time" or "filesys not responding." In severe cases, SMS resource contention may lead to skipped cleaning cycles, capacity growth, backup or replication impacts, and management application discovery failures.

In Data Domain HA environments, network connectivity alerts (EVT-NETM-00001) for RDMA interfaces may automatically clear on the active node even when the physical link has not been restored. This occurs because the RDMA recovery mechanism can temporarily change interface states, causing netmon to interpret the condition as resolved and clear the alert prematurely.

This knowledge base article explains what happens when an unexpected file system Data Domain File System (DDFS) restart occurs, the potential alerts encountered and what information to capture for triage purposes.

DD Boost users may remain undeletable after their associated storage units are removed, particularly when storage units were automatically created by PowerProtect Data Manager (PPDM). Running a file system clean operation, followed by DD Boost user unassignment and user deletion, removes the stale references and allows the user accounts to be deleted successfully.

Data Domain HA status reports degraded with SMS mirroring failure due to an iDRAC stability issue that returns HTTP 500 when enumerating users.

NetWorker space reclamation from Data Domain may not proceed due to connectivity issues, even after media database records for the files are removed.

This KB article describes how to remove security role users on Data Domain systems.

This KB is intended for Dell Partners and NetWorker support. This KB details a troubleshooting approach and does not provide a solution for any specific failure.

DataDomain Alerts relating to the Filesystem do not generate Emails from the DDMC

Backup jobs using DD Boost may fail with a "Maximum number of opened connections cannot exceed 60" error when the backup application reaches a supported backup chain or restore point limitation. This condition is generally related to backup software design constraints and retention configuration rather than a Data Domain system issue.

Data Domain systems upgraded to DDOS 8.3.1.40 and DDOS 8.6.1.20 stop reporting to DDMC 8.5.0.0 or DDMC 8.6.0.0.

Data Domain Boost over FC (DFC) is not supported in most virtual environments

A BoostFS-mounted drive on Windows may appear as "Disconnected" in Windows Explorer or generate connectivity-related errors even though BoostFS authentication, mounting, DDBoost communication, and backup operations are functioning normally. In these cases, investigation may determine that the behavior originates from the Windows client operating system or endpoint security software rather than Data Domain or BoostFS.

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

This article provides guidance for troubleshooting common BoostFS issues, including connectivity, mount failures, lockbox problems, performance concerns, and compatibility validation. It also outlines recommended checks, log collection locations, and information to gather when investigating BoostFS-related issues.

A user was unable to write to a BoostFS-mounted storage unit after directory ownership was changed from a user-owned group to a shared operations group. Investigation confirmed the behavior is expected because BoostFS authorization checks rely on the user's primary group, unlike some NFS configurations where mount-point permissions may allow broader write access.

This guide explains what Dial Home is on Data Domain systems, what data it sends to Dell, and how each connection method and report type works. Expectations are set for how these automated reports speed issue detection, simplify support, and improve system‑health visibility.

Data Domain claims to need a replication license for a local copy operation which has never historically required one.

Token-based authentication in DD Boost OST Plug-in 8.4 provides a more reliable authentication method and helps avoid intermittent credential decryption issues seen with earlier authentication handling in some NetBackup 10.x environments. It also improves credential security by eliminating dependence on encrypted password decryption workflows.

Clear entries by removing PostgreSQL DB and reinstalling Avamar REST API rpm package.Troubleshoot backup failure by checking software version and client properties on NMC1.