Data Domain

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

This article describes the cause of and resolution for the alert "EVT-STORAGE-00025: Current cache tier size is less than what the system is licensed for".

Cleaning too often can cause fragmentation (poor locality), which negatively affects performance in all areas.

A support bundle (SUB) is a compressed archive of various log and configuration files from a Data Domain (DD). DD support and engineering use its contents when investigating issues. As a result, support agents are likely to ask for a SUB while working a support case. This article describes various methods to generate and collect a SUB and upload it for review.

This article describes how to resolve the condition where a disk drive is in a failed, absent, or powered off state.

Due to a software issue within DDOS (8.3.0.0), a daily disk failure is reported on external storage attached to systems running Protection Pool RAID (e.g DD6400)

A NetWorker VMware Protection (NVP) Virtual Machine (VM) File Level Restore (FLR) fails to mount. Instant Access restore may also fail. The error logging returns that the vProxy failed to log in in to the Data Domain because the REST service on the Data Domain is disabled.

Cloud tier cleaning will not start a quota limit that the ECS admin controls has been reached

Failover bonding on Data Domain relies on link state. If a NIC fails without link change, failover will not occur, causing possible connectivity loss if no alternate interface exists.

This article provides frequently asked questions and solutions for a DDOS upgrade.

NetBackup restores failing due to a changed SIZE_DATA_BUFFERS_DISK to 1048576 (1MB) (or a value that is similar)

To provide the air-gap feature of Cyber Recovery (CR), it ups and downs replication interfaces on Data Domain. There is a timing issue, with bonded interface configuration, that results in link status down being reported.

Interface groups can be used to control the interfaces used for DD Boost MFR, to direct the replication connection over a specific network, and to use multiple network interfaces with high bandwidth and reliability for failover conditions. All protection system IP types are supported—IPv4 or IPv6, Alias IP/VLAN IP, and LACP/failover aggregation.

Introduced in DDOS 7.5 and DDMC in 7.11, multifactor authentication adds an extra layer of security on the protection system. It requires the security officer and system administrator to enter an RSA SecurID passcode before certain destructive commands or configuration changes are allowed. The Multifactor Authentication panel allows the user to configure, enable, and disable multifactor authentication.

Data Domain - /data/col1/backup MTree is the default MTree that has been created for backward compatibility to older DDOS versions and is not allowed to be deleted.

When using failover bonding, the standby interface has many dropped packets. This is expected since the standby interface is not active.

DDOS can diagnose authentication issues for Active Directory from within the DD System Manager interface.

This article explains how to create a DD Boost Protocol Storage Unit using either UI or CLI.

About interface groups: This feature lets you combine multiple Ethernet links into a group and register only one interface on the protection system with the backup application. The DD Boost Library negotiates with the system to obtain the best interface to send data. Load balancing provides higher physical throughput to the system. Configuring an interface group creates a private network within the system, consisted of the IP addresses designated as a group. Clients are assigned to a single group, and the group interface uses load balancing to improve data transfer performance and increase reliability.

This issue is not caused by Data Mover itself. It occurs due to NFSv4 identity-mapping behavior on the client side.

This article describes the purpose of the Domain Name System (DNS) alert "Unable to communicate with configured DNS" on Data Domain operating system 5.5 and later.

This KB article describes when to use if group and when to use link aggregation control protocol bonding and when to use both simultaneously.

The Data Domain system backup operations rely on the Data Domain system file system. In case the file system is disabled or failed, all backup operations to the device will be halted. This document lists steps on how to verify if the file system is working properly.

Error while destroying the ddboost association

MTREE replication shows incorrect bytes_remaining during initialization.

NetBackup Air Replication error "DDErrNo = 5034 (the user has insufficient privilege)."

DDBOOST_USER' does not have sufficient access rights is seen from NetWorker side even though DDBOOST user is working fine from DD side and also if you tried to change PW, assign new Storage Unit it encounters same error "DDBOOST_USER' does not have sufficient access rights"

On DDOS versions 7.10, 7.13, 8.0, 8.1, 8.2, 8.3.0.x Data Domain (DD) systems with drive firmware updates enabled may encounter unexpected, false disk failures. Specifically, two devices per Disk Group (DG) can transition to a failed state due to a RAID module reference count issue in the kernel. This can lead to system instability and potential data availability risks.

This article explains the supported compression algorithms on Data Domain systems and provides guidance on selecting the appropriate compression type based on performance and data characteristics.

This article addresses potential communication issues between PowerProtect Data Manager (error code ADS0005) and Data Domain during discovery jobs, focusing on MTU mismatches.