itsexe
Enthusiast
Enthusiast

How to Present a Same storage as RDM to two Virtual Machines

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Hi I have a question.

We have one ESX4.0 server with two Virtual Machines running on it. I have presented a stroage of 100 GB from SAN to this particular ESX host, this storage space is to be shared between two VM's as RDM.

But when I add this storage to one VM as RDM, it doesnt allow me to present the same storage to other VM the option of RDM is shown as hidden. Is there any possibility to do this.

Regards,

Khurram Shahzad

Regards, Khurram Shahzad
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Rumple
Virtuoso
Virtuoso

This is only possible with MSCS clustering functionality. Presenting the same LUN or disk to multiple hosts without clusting will corrupt the data/volume as the new system will try to initialize the disk.

Your RDM may also need to be in virtual compatibility mode to do this.

Check out the vmware guide on clustering with MSCS and it should have information on that.

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3 Replies
Rumple
Virtuoso
Virtuoso

This is only possible with MSCS clustering functionality. Presenting the same LUN or disk to multiple hosts without clusting will corrupt the data/volume as the new system will try to initialize the disk.

Your RDM may also need to be in virtual compatibility mode to do this.

Check out the vmware guide on clustering with MSCS and it should have information on that.

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glynnd1
Expert
Expert

You may also need to connect to the ESX host directly rather then to vCenter.

jheideman
Contributor
Contributor

"You may also need to connect to the ESX host directly rather then to vCenter."

This is exactly what we had to do to resolve the same issue

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