Operating System - VMware
Showing results for 
Search instead for 
Did you mean: 

modifying device GUID

system ya
Occasional Advisor

modifying device GUID

on a Vmware ESX 3.5 with VC 2.5 environment -
I have the same disk (containing VMFS volume) masked to different servers within the cluster.
on some servers it has a different GUID assigned than others. thus, the datastore name on these server is different (snap-*). there are production servers that running and using this VMFS volume. can I change the GUID on these ESX server without shutting down the hosts?
Uwe Zessin
Honored Contributor

Re: modifying device GUID

**OUCH**, **OUCH** and **OUCH**, **OUCH** :-(

That sounds like somebody made a big error by resignaturing the VMFS on a server with an incorrect LUN presentation.

I recommend you open a SR with VMware *NOW* and ask if they can help to recover.

With standard tools and without inside knowledge I think you have *ZERO* change to do that while keeping the hosts running and you even risk data corruption.