Error: "Datastore "XXX" conflicts with an existing datastore"

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PROBLEM

Recently I tried to upgrade one of my ESXi hosts from version 6.7 to 7.0 using VMware Lifecycle Manager. The upgrade gets stuck at 47%.

However, when I take the remote console using iLO, I see the ESXi is already upgraded. The LCM Events and logs show that vCenter is not able to connect to the host.


I tried to connect the Host manually and got the below error:

Datastore "XXX" conflicts with an existing datastore in the datacenter that has the same URL "UUID", but it is backed by different physical storage.



RESOLUTION

1.    Check if the all the vmhba are visible: Run this command to see all vmhba - esxcfg-scsidevs -a or esxcli storage core adapter list

2.    Check if the vmhba drivers are compatible. In my case smartpqi driver had to be upgraded to latest version. (Microchip-smartpqi_70.4054.2.118-1OEM.700.1.0.15843807_17871815)

3.    Check if the datastore is accessible and visble from ESXi UI or ESXCLI.

4.    Remove the host from vCenter Inventory and try to add it back.

5.    If the issue persists then follow this VMware KB. Before following this KB, make sure to take full Backup of vCenter Server and align for a downtime as you would need to restart vCenter Server Service.

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