free space

Acronis SharePoint Explorer: Extraction to functioning site or in SharePoint content migration package format fails with "Failed to create package file" or with empty message.

Acronis Backup products do not take into account tape hardware compression while calculating space on tape media.

Symptoms

New tape is used to continue backup when there is free space on previous tape.

OR

Backup archive uses more tapes than required by its size: e.g. 14GB backup archive requires 17 tapes of 1 GB size.