Existing volume mount to the additional esxi box

Sudhir_ster — Wed, 04 Jun 2025 09:39:23 GMT

Hi ,

I have two esxi box and one volume created in Netapp E series and added to one of the esxi box and created the vmfs data store and drives created and mounted to the Windows vm's .

Now we have requirement to add the same netapp e series volume to the second esxi host .

But when i tries to add the same volume to the ESXI group in e series it changing the LUN id 0 .

So question is whether is doable or i have to follow some other method to add the same volume visible in two esxi box without the data loss .

Sudhir T

Re: Existing volume mount to the additional esxi box

elementx — Tue, 16 Apr 2024 05:27:54 GMT

> add the same volume to the ESXI group in e series it changing the LUN id 0

How does that impact your vSphere?

As far as I know ESXi cares about its own volume IDs (and signatures) & block device IDs, and does not LUN IDs, so changing LUN numbers don't effect it. ESXi-to-device mapping may be viewed like in this KB - https://kb.vmware.com/s/article/2030957 and you can save this end-to-end VMFS-to-device-to-volume mapping to a text file for your own reference.

I only know of these generic FC SAN best practices common to all SANs, and I don't remember I've ever seen any recommendations related to LUN numbers.

https://docs.vmware.com/en/VMware-vSphere/8.0/vsphere-storage/GUID-0C1B4D0A-F993-4F8A-8255-EE156A85C904.html#GUID-FAB12D4A-E213-43DC-9D83-7F1F4DC1F802__GUID-5A8E439F-18B0-4778-BBCA-6A981098181F

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Existing volume mount to the additional esxi box

Re: Existing volume mount to the additional esxi box