stop recieving message "you need to format the disk in drive XXX: before you can use it. Do you want to format?" each switchover in cluster

HI,
I have unformatted volumes as resources in my cluster.
Each time I do a switch over I get this message, which is dangerous because in mistake I can format the volume and delete it's contents!
Is there a way to disable this message?
Thanks, Anat

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anat