Beware UNC path syntax for shared dirs used in a windows cluster!

This seems to be an undocumented but vital piece of information:
If you are setting up a Windows based cluster and you are using UNC paths
to identify the shared file locations for IntradocDir (Instance Dir), Vault dir
and Weblayout dir, please start your paths with 4 backslashes!
For instance, if you are putting your share on \\MYNAS\share\cs
The paths as configured in the intradoc.cfg should follow this pattern:
IntradocDir=\\\\MYNAS/share/cs
VaultDir=\\\\MYNAS/share/cs/vault
WeblayoutDir=\\\\MYNAS/share/cs/weblayout
Now, the documentation, if read carefully, will lead you to believe starting
with two forward slashes will work.
In other words, like this:
IntradocDir=//MYNAS/share/cs
And on an initial system start, it may even seem good to go, BUT BEWARE!
When using only the forward slashes, at least two problems may arise:
1. Any custom component which use java and therefore require a classpath may
fail to load their classes. This will result in ClassNotFound exceptions
when class loading is attempted.
2. OracleTextSearch may not be able to index files and you will see "oit" errors
in the log.
This may be jvm and windows version specific but I noticed this on Windows server 2008 R2
using the JRockit 64 bit jvm.

As mentioned above I spotted Shadow Copy configuration problems in clustered environment on Windows 2012 R2 with latest updates.
Enabling Shadow Copy via Cluster Manager on disk will enable schedule and snapshots but schedule is not-cluster aware (is created locally on node) and "Previous Versions" are visible only locally but not via shared folders (UNC path accesible by
clients)
When I spotted this behavior I tried different way going via Computer Management and cluster resource name but console always hangs for me when using "Configure Shadow Copies". After many minutes configuration window is opened (Hurray!) but any
action there will hang whole console again. Enabling Shadow Copies will fail with "0x80004005: Unspecified
error" for creating scheduled task but "Next Run Time" column still shows "Disabled". Checking disk resource via Cluster Manager shows it is enabled and ?local? scheduled task is created.
Computer management console still shows DISABLED and any action freezes whole console (only when cluster resource name is used).
This fix I found, unfortunately, is not applicable to 2012 R2 OS: https://support.microsoft.com/en-us/kb/2894464
To sum up there is a major bug in MS implementation in Shadow Copies for Shared Folders when clustering is used or it is still not supported in 2012 R2? Doing it outside cluster works as it should (without freezes and Previous Versions are available via
UNC)
There is no documentation about FileServer Clustering on 2012(R2) unfortunately.
Could someone from MS clarify it?
Many thanks
Filip
EDIT:
Ok, one correction:
Scheduled task is not created in "Failover Clustering" hive of Scheduled tasks as user may expect but failover of fileshare to other node will unregister/reregister it on active node only.

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