topic modifying device GUID in Operating System - VMware

modifying device GUID

system ya — Mon, 02 Nov 2009 11:51:04 GMT

Hello,
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?

Re: modifying device GUID

Uwe Zessin — Mon, 02 Nov 2009 18:42:31 GMT

**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.