Acronis Backup for Windows Server Essentials - User Guide - Manual (Page 248)

248 Copyright © Acronis International GmbH, 2002-2014
Please be aware that consolidation is just a method of deletion but not an alternative to deletion.
The resulting backup will not contain data that was present in the deleted backup and was absent
from the retained incremental or differential backup.
There should be enough space in the vault for temporary files created during consolidation. Backups
resulting from consolidation always have maximum compression.