2 Cluster Shared Volumes filling up with shadow copies and I can't delete them.

• three node Server 2012 R2 cluster
• 2 CSVs
• Veeam Backup software v7

We've been running out of space on our CSVs. I determined that the hidden System Volume Information directory is huge. It is huge because of large VSS files in the directory.

Path to CSVs

c:\ClusterStorage\Volume1

c:\ClusterStorage\Volume2

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List of VSS providers

vssadmin list providers
vssadmin 1.1 - Volume Shadow Copy Service administrative command-line tool
(C) Copyright 2001-2013 Microsoft Corp.

Provider name: 'SmVssProvider'
   Provider type: Hardware
   Provider Id: {24e4e8a3-69cb-4370-8b7b-c5276cd49765}
   Version: 11.10.0001

Provider name: 'Microsoft CSV Shadow Copy Helper Provider'
   Provider type: Software
   Provider Id: {26d02d81-6aac-4275-8504-b9c6edc5261d}
   Version: 1.0.0.1

Provider name: 'Microsoft CSV Shadow Copy Provider'
   Provider type: Software
   Provider Id: {400a2ff4-5eb1-44b0-8a05-1fcac0bcf9ff}
   Version: 1.0.0.1

Provider name: 'Microsoft File Share Shadow Copy provider'
   Provider type: Fileshare
   Provider Id: {89300202-3cec-4981-9171-19f59559e0f2}
   Version: 1.0.0.1

Provider name: 'Microsoft Software Shadow Copy provider 1.0'
   Provider type: System
   Provider Id: {b5946137-7b9f-4925-af80-51abd60b20d5}
   Version: 1.0.0.7
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Vssadmin list shadowstorage doesn't reference the location of my CSVs...

PS C:\Windows\system32> vssadmin list shadowstorage
vssadmin 1.1 - Volume Shadow Copy Service administrative command-line tool
(C) Copyright 2001-2013 Microsoft Corp.

Shadow Copy Storage association
   For volume: (C:)\\?\Volume{6bf32257-eccb-11e3-80b5-806e6f6e6963}\
   Shadow Copy Storage volume: (C:)\\?\Volume{6bf32257-eccb-11e3-80b5-806e6f6e6963}\
   Used Shadow Copy Storage space: 0 bytes (0%)
   Allocated Shadow Copy Storage space: 0 bytes (0%)
   Maximum Shadow Copy Storage space: 13.6 GB (10%)

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PS C:\clusterstorage\volume1> mountvol
Creates, deletes, or lists a volume mount point.

MOUNTVOL [drive:]path VolumeName
MOUNTVOL [drive:]path /D
MOUNTVOL [drive:]path /L
MOUNTVOL [drive:]path /P
MOUNTVOL /R
MOUNTVOL /N
MOUNTVOL /E

    path        Specifies the existing NTFS directory where the mount
                point will reside.
    VolumeName  Specifies the volume name that is the target of the mount
                point.
    /D          Removes the volume mount point from the specified directory.
    /L          Lists the mounted volume name for the specified directory.
    /P          Removes the volume mount point from the specified directory,
                dismounts the volume, and makes the volume not mountable.
                You can make the volume mountable again by creating a volume
                mount point.
    /R          Removes volume mount point directories and registry settings
                for volumes that are no longer in the system.
    /N          Disables automatic mounting of new volumes.
    /E          Re-enables automatic mounting of new volumes.

Possible values for VolumeName along with current mount points are:

    \\?\Volume{6bf32256-eccb-11e3-80b5-806e6f6e6963}\
        *** NO MOUNT POINTS ***

    \\?\Volume{6bf32257-eccb-11e3-80b5-806e6f6e6963}\
        C:\

    \\?\Volume{bd46bae7-015c-4115-88ca-e6e9067fdea1}\
        C:\ClusterStorage\Volume2\

    \\?\Volume{caf6938a-5faa-4f3b-8e2b-e27d1498dedf}\
        C:\ClusterStorage\Volume1\

    \\?\Volume{6bf3225c-eccb-11e3-80b5-806e6f6e6963}\
        D:\

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