PowerEdge R250

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.

This article provides a step-by-step guide on how to remove and install a cooling fan on a Dell system. These instructions are applicable to both standard and high-performance fans. The guide covers the removal and installation of the cooling fan assembly.

PowerEdge servers crash with PCIe fatal errors while updating Kioxia CM6 NVMe drive firmware.

CPUs can be perceived to be hot while server is idle.

Beginning with 15G PowerEdge, servers are offered in configurations that report more drive connections than are physically available.

During continuous reboot testing, the system may stop responding during the shutdown phase due to an internal error (CPU0000) on PowerEdge T150, R250, R350, T350 systems.

Seagate Summit SAS/SATA drives report medium errors or sense key 3/11 on PowerEdge and PowerVault systems due to a firmware issue causing weak writes to a drive sector.

The Dell SS540 SAS solid state drive is reported as not correctly functioning.

In some instances, the firmware update job may fail to initiate when performing a firmware update through available iDRAC interfaces.

In Windows Server 2025, when leveraging CPUs with more than 256 cores, the Broadcom BCM5720 fails to retrieve a DHCP address, leading to no network connectivity.

OpenManage Enterprise integration for VMware vCenter may fail to Unmanage hosts with error "UNMANAGE_REMOVE_MEL_FAILURE"

When a PS1010 or PS1030 NVMe SSD is installed, a PSOD may occur during production or gathering Operating System (OS) logs.

A stop during POST is possible after a customer changes Secure Boot Policy from either Standard or Custom to VMware Boot or Linux Boot.

This article describes the different type of controllers and the ways in which they should be reseated.

Warning messages regarding "icen_SetRxQueueFilter" and "Failed to add cloud filter" in ESXi 8 VMware VMkernel log.

The article describes how to troubleshoot network connectivity issues for network cards.

Seagate Skybolt and SkyboltServoBP drive fails with medium format corrupted errors.

This article presents opportunities to understand and troubleshoot some common causes of fan noise in a PowerEdge server. It is also relevant for 100% fan speeds.

Dell has introduced significant updates to how PowerEdge servers manage coin-cell (CMOS) battery functionality and related event logging. Beginning with 14th Generation (14G) servers in August 2024 — through iDRAC and BIOS firmware updates — and extending to 15G and 16G platforms from February 2025 onward, several key changes have been implemented

This article provides information about Fatal BUS errors seen with PCI1360 and PCI1318.

How to create Cluster Shared Volumes by manually calculating the necessary disk space value.

Dell Intel SATA SSD drives may report a not correctly functioning PDR3 event, potentially resulting in a drive failure condition.

This article describes how to view and clear the system event log (SEL) in System Setup.

This article describes how to find the iDRAC's current MAC address.

The PowerEdge 16G 700 W Power supply, Dell Part Number (DPN): 3D09N, only supports high line voltage, the input voltage range is 200 V AC-240 V AC.

PowerEdge 14/15G servers cannot downgrade to iDRAC9 firmware versions 4.40.10.00 and older once the iDRAC9 has installed the June 2024 firmware release.

During the power counter roll-over for utilization, the power counter rolls over before the rollover counter. This leads to an erroneous power spike which may throttle the server.

Initiating a graceful restart or shutdown using Redfish APIs may fail for the Windows Server Operating System.

Dell solid state drive (SSD) fails after system reports low environment operating temperature.

Microsoft Hyper-V Virtual Machine (VM) Live Migration may fail or no LUNs are mapped after powering on VMs due to Windows architecture and hardware configuration limiting the number of vFC LUNs.