MSDTC - 2008 R2 Failover Cluster

Hi,

I have a 2008R2 Failover cluster, upon which is SQL2008R2. Storage is presented to both nodes correctly. I can see it within computer manager (below)

I have failed over to the pasive node and Ive noticed although the MSDTC service is still online and the owner is correct, the disk is not able to be seen via the new active node.

My question is why is this? and what can I do to resolve this?

Any guidance would be great. Thanks