DFS Clustered file servers

Hi,
We have a DFS configuration on a clustered 2008 R2 server environment. It has been working fine before but now it is failing to work.
The DFS replicted folders woult not come online when failing over to the secondary DFS server.
In the cluster event logs i have the following:

Event ID 1205
The Cluster service failed to bring clustered service or application 'File cluster' completely online or offline. One or more resources may be in a failed state. This may impact the availability of the clustered service or application.

Event ID 1069
Cluster resource 'DFSR D:\Data\Corporate' in clustered service or application 'File cluster' failed.

I have about 200 of these events logged when trying to come online in the secondary cluster server node.

I ran the cluster validation report, but obviously due to the time I couldnt do a full one which brings the cluster disks offline. I have cluster resource warnings:
This resource is not configured to use the standard 'Pending timeout' value for the resource type. 'Pending timeout' specifies the length of time the resource can take to change states between Online and Offline before the Cluster service puts the resource in the Failed state. The default setting is generally recommended, but there may be situations where other values may be preferable. This setting can be configured in Failover Cluster Manager by selecting 'Properties' and then selecting the 'Policies' tab.

This is currently set to 15 minutes, and has been like that for years. Other than this, nothing really else in the report to show any issues. I will try organise for some downtime to take the cluster disks offline and run a full report, to see if this returns any issues for the disks.

Other than the above, anything else I can look at in the meantime?

Thanks