DD OS

Data Domain systems initiate a graceful shutdown if multiple disk failures occur and RAID reconstruction cannot proceed. This protective measure prevents potential data loss when RAID protection reaches a critical state.

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.

A bonded interface speed mismatch alert may occur when one member interface negotiates at a lower speed than the other member interfaces in the bond, causing the alert to remain active until all interfaces operate at the same speed.

A VLAN interface became inaccessible after a reboot because an invalid MTU configuration was rejected during initial configuration but was still persisted in the registry, causing the interface to fail when the system later attempted to apply the invalid MTU during interface initialization.

A TX timeout triggered the QLogic auto-recovery mechanism, which reset the interface from the configured MTU of 9000 to the default MTU of 1500; if the issue reoccurs, we can either manually restore the MTU or keep the interface configured with the default value.

Host certificates allow browsers and applications to verify the identity of a Data Domain system when establishing secure management sessions. HTTPS is enabled by default. The system can use either a self-signed certificate or an imported certificate from a trusted Certificate Authority (CA). This article explains how to check, generate, request, import, and delete certificates for HTTP/HTTPS on Data Domain systems.

Ephemeral UDP port range usage

A Dell Data Domain DD6400 system may intermittently generate false "EVT-STORAGE-00039: RAID reconstruction is in progress" alerts even though no disk failures, disk errors, or active RAID rebuilds exist.

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

Steps to upgrade Intel x550 NIC card firmware from version 18.8.9 to 19.5.12 required to upgrade to DDOS 7.2.0.120.

Renamed or deleted PowerScale shares are still visible within the PowerProtect Data Manager user interface.

Updating DD Boost imported certificates for all Data Domains (DD).

FLR fails saying that it is not available for datastores () using transport mode 'Hotadd'

This KB describes how to restart (IPL) an IOP on an IBM System i.

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

This guide details compatibility of MTree, Managed File, directory, collection, and delta replication across Data Domain Operating System (DDOS) version families, with notes on limitations.

This knowledge base article explains what happens when an unexpected file system restart occurs, the potential alerts encountered and what information to capture for triage purposes.

Data Domain may show amber LED and Power Supply Unit (PSU) alert EVT‑ENVIRONMENT‑00026 after an Uninterruptible Power Supply (UPS) Power Distribution Unit (PDU) replacement or power‑maintenance. Cached indictments and iDRAC log cause this, not hardware failure.

This article describes how to troubleshoot memory-related alerts on Dell Data Domain systems, including how to identify a faulty DIMM that requires replacement. It covers common alert codes, root causes of correctable and uncorrectable ECC errors, and step-by-step resolution guidance such as initiating POST-Package Repair (PPR), running diagnostic CLI commands, and performing physical troubleshooting.

This article provides download links and status information for current PowerProtect Data Domain Operating System (DDOS) releases, including feature and Long‑Term Support (LTS) versions. It also outlines upgrade considerations, documentation references, and supported platforms.

This article explains how disk reconstruction works on Data Domain systems and how to monitor reconstruction progress after a disk failure.

On intel network cards changing virtual bond to another bonding type while switch is still LACP triggers a possible driver bonding issue and disables all interfaces on all cards.

AWS is changing their server certificates from S3 to certificates issued by Amazon Trust Services CA. This change impacts Data Domain systems that are configured with Cloud Tier and Data Domain Virtual Edition (DDVE) deployed on AWS Cloud platform with Active Tier on Object Storage (ATOS).

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. This failure results in continuous restarting due to changes in SSL handling.

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 which are a side effect of the one‑click upgrade.

After upgrading Data Domain OS to 8.6, the mail server began logging warning messages daily related to unexpected HTTP traffic coming from the Data Domain system.

This Article describes a specific circumstance where space reclamation may not proceed despite a lack of media database records for the files in question.

This article answers common questions about Data Domain licensing, including electronic licensing (ELMS), license management, and deployment using Software License Central.

Data Domain sysadmin/SO password resets no longer require Support intervention when running DDOS (7.10.1.40 or newer). A password reset token is sent to the registered email address. Copy the token to a supported USB drive, insert it into the system, and log in as sysadmin or security officer to reset the password.

DDoS 8.7 introduces a check that triggers a warning alert when file replication is configured with anonymous authentication, encouraging the use of stronger authentication methods for improved security.