Drill holes / spares files

Are you using a NAS, because otherwise it is likely you will not have to worry about sparse?

Recent feature releases state on the Library/Data Path properties if detects that Sparse is supported. Without knowing what NAS or Operating System you are using it is hard to provide specifics, but if you are using Data Paths on Windows Servers then the File System attribute is called FILE_ATTRIBUTE_SPARSE_FILE. Not all NAS vendors openly state however if they support sparse and some may require you to enable it (like Dell OneFS), but if you want to test it out independently from Commvault then you can experiment with fsutil sparse commands (https://docs.microsoft.com/en-us/windows-server/administration/windows-commands/fsutil-sparse).