https://community.spiceworks.com/topic/461716-what-is-the-best-way-to-shrink-a-thin-provisioned-disk

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http://pubs.vmware.com/vsphere-51/index.jsp?topic=%2Fcom.vmware.vsphere.storage.doc%2FGUID-CBF31A6B-B36F-4552-B512-CC92B1943902.html

Removing Zeroed Blocks

Use the vmkfstools command to convert any thin, zeroedthick, or eagerzeroedthick virtual disk to a thin disk with zeroed blocks removed.-K –punchzero

This option deallocates all zeroed out blocks and leaves only those blocks that were allocated previously and contain valid data. The resulting virtual disk is in thin format.

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Poblano

Gabrielle,

I did the sdelete -z and this cleared up the space on one of my drives. Which worked awesome for this particular issue I ended up just added a new drive to the system copied the 5 GB of data over changed the drive letter, rebooted and brought my application back online. Worked great. Thanks for the information.

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http://www.virten.net/2014/11/howto-shrink-a-thin-provisioned-virtual-disk-vmdk/