We have created few volumes in storage array. Via Iscsi initiator those volume have been added into host machine which is Windows 2012 R2. For few volumes when we delete the contents ,the volume size is not reduced in the storage array side. But the disk content is deleted from host side. In the array side when we verify there is no unmap stats. So we suspect that from host side there is no unmap event is triggered.
How to find whether UNMAP request is raised from windows host? we are checking event viewer, but don't know how to look for UNMAP request. Can some one help?