Dell Unity: Windows host using native MPIO unable to see LUNs on depopulated Unity XT 380 (Dell Correctable)

Summary: Windows hosts using native MPIO are unable to see LUNs on a Unity XT 380/380F with depopulated service processors. This occurs when using the last two ports of the IOModule (port 2 or 3). Or when using the two CNA ports (4 or 5) without an IOModule installed. ...

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Symptoms

  • Windows hosts using native MPIO are unable to see LUNs
  • Unity OE 5.2.x
  • Unity XT 380 or 380F with depopulated (no onboard Ethernet ports) service processors (SPs)
  • Using the last two ports of the IOModule (port 2 or 3) or using the two CNA ports (4 or 5) without an IOModule installed.
  • The issue happens on both ISCSI connected and FC connected hosts.
  • The issue happens with direct connect hosts and hosts connected through a switch.
  • Windows VM with MPIO enabled shows two disks in Disk Management instead of having two connections seen as one disk.

Cause

The Unity XT 380/380F running OE 5.2.x supports the new depopulated storage processors with the onboard Ethernet ports removed. 

Unity XT 380 depopulated SP.png

Windows hosts using native MPIO are unable to see LUNs on a Unity XT 380/380F with depopulated service processors. This occurs when using the last two ports of the IOModule (port 2 or 3). Or when using the two CNA ports (4 or 5) without an IOModule installed.
 
 

Resolution

Fix:
  • This issue is fixed in Unity OS: 5.3.1.0.5.008
  • Hotfixes are also available for Unity OE version 5.2. Contact Dell Technical Support or your Authorized Service Provider and quote this Dell Knowledge Base article ID to obtain those fixes.

Workaround:
  • If an IOModule is installed, use CNA ports 4 & 5 and IOModule ports 0 & 1.
  • Use PowerPath instead of Windows native MPIO. 
  • If there is no IOModule installed, CNA ports 4 and 5 do not work for Windows hosts using native MPIO.

Affected Products

Dell EMC Unity XT 380, Dell EMC Unity XT 380F
Article Properties
Article Number: 000212923
Article Type: Solution
Last Modified: 25 Jul 2025
Version:  11
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