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LUN or File System temporarily goes offline but comes back online by itself.
Updated: May 12, 2026
ID: 000193664
If inconsistent block size settings are used in the 2-way NDMP data transfer path, the NDMP backup will not work and the tapes used during the backup may be marked full prematurely. It has been observed that the NDMP backup will start but the tape loaded in the drive gets marked full immediately, even if there is space remaining on the tape.
Updated: May 12, 2026
ID: 000192759
Users found that the performance charts are not available in UnityOS 5.1.0 and 5.1.1.
Updated: May 12, 2026
ID: 000192659
This article describes how to copy customer data back to system drives from the hotspare used in Traditional pools.
Updated: May 12, 2026
ID: 000192478
A Dell Unity Storage Processor (SP) may unexpectedly reboot due to Memory Map (MMAP) issues.
Updated: May 11, 2026
ID: 000191697
Drives can experience multi-bit CRC errors and go offline.
Updated: May 11, 2026
ID: 000191642
Increased latency on NFS exports lasting about 30 seconds when the export settings are modified when using DNS names for hosts not IPs.
Updated: May 11, 2026
ID: 000191522
If User Quota is enabled, when you check the size of the drive-mapped space from Windows client side, it is expected to show the size allocated by User Quota.
However, after rebooting SP, the file system size was displayed instead of the User Quota size.
Updated: May 11, 2026
ID: 000191431
Under certain out-of-space conditions, an upgrade to 5.1 may trigger file system offline or rolling SP reboots.
Updated: May 11, 2026
ID: 000191205
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.
Updated: May 11, 2026
ID: 000205512
After upgrading to 5.1, some users are unable to log in to Unisphere when their accounts are managed by LDAP.
Updated: May 11, 2026
ID: 000190984
Upgrading to 5.1 breaks any calls that are issued using the nfs_v3_readdirplus call from Solaris NFSv3 clients.
Updated: May 11, 2026
ID: 000190227
FTP/SFTP download may failed when customer FTP/SFTP server (NFS client) use Unity NFS share on Unity with NFSv4.0/NFSv4.1 as backend storage.
Updated: May 11, 2026
ID: 000190195
A blank upload error appears in the Unisphere dialog with no specific error message or error code.
Updated: May 11, 2026
ID: 000190184
Dell EMC Unity: Saving Configuration from Unisphere returns an error message. (Dell EMC Correctable)
Unable to save the configuration file due to an error when running save configuration from Unisphere UI.
Updated: May 11, 2026
ID: 000190077
The Veeam backups do not complete after upgrading Unity OE to version 5.1 or later. It is unclear whether other Unity OE versions have Veeam backups not working. (Dell Correctable)
Updated: May 10, 2026
ID: 000189458
Dell EMC Unity software reports error in Unisphere when an internal SSD is fully worn; however, there are no reported Alerts or dial home errors.
Updated: May 10, 2026
ID: 000189150
After Windows update Windows server can no longer connect to event logs exported from NAS servers on Unity
Updated: May 10, 2026
ID: 000189093
High number of hanging jobs "Delete VMware Virtual Volume"
Unity Administrator did not initialise any of those jobs (all started automatically)
Updated: May 10, 2026
ID: 000188804
Hosts keep disconnecting from the Unity storage system.
Updated: May 10, 2026
ID: 000188553
Random stop responding conditions and performance issues while trying to access the exports on the destination side of replication. (User Correctable)
Updated: May 10, 2026
ID: 000187917
How to check if System VDM (SVDM) is running on SPA or SPB (User Correctable)
Updated: May 10, 2026
ID: 000187757
Migrating data to a Unity FLR enabled file system results in the lastTimeWrite-Date being changed for some files to a time in 1980.
Updated: May 10, 2026
ID: 000187051
In the General tab of Quota Tree Properties, the Input Field is too small.
Updated: May 10, 2026
ID: 000186820
This article describes a condition that affects Unity systems that have been recently upgraded to Unity OE version 5.0.6., which introduces support of secure RPC function.
Updated: May 09, 2026
ID: 000185870
This article covers the expectations of NDMP restores and which considerations to have towards it's Theory of Operation alongside Unity NAS Servers, having particular attention to its behavior when restoring a very large amount of small files.
Updated: May 09, 2026
ID: 000185519
Customer has VASA enabled/configured, but unable to expand LUN from VSphere. We were able to expand the LUN from within Unisphere.
Updated: May 09, 2026
ID: 000184890
This article explores the impact of asynchronous replication on array performance during space reclamation from large virtual machines (VM).
Updated: May 09, 2026
ID: 000184863
Dell EMC Unity: How to check if ODX (Offline Data Copy) is being invoked on Unity (User Correctable)
This is how you can check if ODX is in use on Unity
Updated: May 09, 2026
ID: 000184664
CIFS servers lose connection after GPO applied to enforce AES encryption types
Updated: May 09, 2026
ID: 000184663