It inevitably fails that I'm on-site doing SAN work or cluster work and needing to add a drive to a cluster for some reason or another - whether that be physical or virtual within VMware. 

After all the creation, alignment, formatting, LUN masking and everything else is done to prep the disk, hosts, etc.  Windows always gives me grief in that it does not recognize the drive letter I want to add in the cluster admin GUI. 

In this case, I pull out my trusty "cluster.exe" command line utility and add the disk the old fashioned way - forcefully :)

Example:

<strong>C:&gt;cluster . res "Disk L:" /create /group:"Exchange Group" /type:"physical disk"</strong>

<strong>C:&gt;cluster . res "Disk L:" /priv Drive="L:"</strong>

Voila!  Breakfast is ready....
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