Dell EMC Unity 400

Dust or chemical contamination at the endface of a fiber optic LC connector or transceiver module impedes signaling. Dell engineering teams have verified cases in which a fully functional port appears to be a bad port because dirty optical connectors manifest as a port failing loop testing with acceptable power measurement levels. Cable connectors should be cleaned and when stored must be protected from dust particle or chemical contamination.

Dell Unity software reports error in Unisphere when an internal SSD is fully worn; however, there are no reported Alerts or dial home errors.

The I/O module is powered off. Try rebooting the Storage Processor (SP). If the I/O module remains powered off after a reboot, you may have to replace the I/O module. (Dell Correctable)

This KB provides the method to check active open file count for NFS (NFSv4 only) and active connected NFS client (both NFSv3 and NFSv4) on a live Unity system.

Dell Unity array dials home with error code 1:12dc501 - An internal system service X is offline. Some system services may not be available.

After Windows update Windows server can no longer connect to event logs exported from NAS servers on Unity

This KB details the Management account roles on the Dell Unity and Dell Unity XT systems.

This article explains how to address or order a failed drive in a Dell Unity system for SymptomCode: Neo14:60258 (User Correctable)

Alert 14:38005a is generated when using SupportAssist. The SupportAssist metadata partition has less than xx% of its drive space left. Your SupportAssist function may be affected.

This article describes the errors that are displayed when attempting to join a NAS server to an Active Directory domain (User Correctable)

Some security audit tools may report that a Unity NAS server does not regularly change its computer account password. By default, the Unity NAS server does not change its computer account password regularly. Windows computers change their machine account password every 30 days. (User Correctable)

Attempts to configure LACP results in error: Failed: The system was unable to change the link aggregation settings. This may have occurred because of memory fragmentation. Consider rebooting the relevant SP. (Error Code:0x6000dfc)

This document describes the objects and equipment used by Customer Engineers (CEs) when on-site. Please check and prepare in advance.

This KB describes one of the causes of SupportAssist configuration failures.

Newly added users are unable to access share in a multiprotocol file system.

This KB explains how to manage VNX's unisphere using an LDAP user

The Pre-Upgrade Health Check (PUHC) script fails. The tar reports 'This does not look like a tar archive' and header errors, caused by the browser incorrectly decompressing the tar.gz file.

This KB describes one of the causes of the 0x900a008 error when creating an NFS share.

Is LLDP supported on a Dell Unity array?

This article discusses whether Unity is susceptible to CVE-2026-20833.

When a system drive fails in a traditional pool, a hotspare is used to copy customer data luns. Once the system drive is replaced, the system drive does not become available as a hotspare. This could lead to a hotspare rule failure as there is one less hotspare available.

When we cancel a pool expansion job using UEMCLI, the storage reports that the action was completed successfully although the operation continues in the background. This behavior is corrected in OE 5.1.

Under certain out-of-space conditions, an upgrade to 5.1 may trigger file system offline or rolling SP reboots.

When performing a Pre-Upgrade Health Check (PUHC) on Unity OE 5.1 or later code, it may report an error: dm::check_if_user_root_fs_has_enough_space_1

Unity 5.3 Seahawk brings some significant changes to the Unity product that will affect every customer. In the Seahawk release, the online drive firmware upgrade is periodically run on a physical Unity system to upgrade outdated drives.

After upgrading Unity some administrative issues regarding the VMFS datastore can be noticed. 1. Failure or partial failure adding or removing datastore access to ESXi hosts through Unisphere. 2. From vCenter, it is not possible to see datastore name changes made from Unisphere.

Customers receiving daily alerts that their support contract is about to expire even after renewing the support contract. (Dell Correctable)

Unisphere event log, SNMP, and remote syslog are not updated.

This article discusses the method to get the file fullname path when you have the version 8.3 shortname path.

Unity system dials home with a neo14:601f5 error.