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Data Deduplication
In Windows Server 2012, you can enable the Data Deduplication feature for an NTFS volume. Data
Deduplication reduces the used space on the volume by storing duplicate fragments of the volume's
files only once.
You can back up and recover a data deduplication–enabled volume at a disk level, without limitations.
File-level backup is supported, except when using Acronis VSS Provider. To recover files from a disk
backup, mount the backup (p. 249) on a machine running Windows Server 2012, and then copy the
files from the mounted volume.
The Data Deduplication feature of Windows Server 2012 is unrelated to the Acronis Backup
Deduplication feature.
3.11 Compatibility with encryption software
Acronis Backup fully retains its functionality when interacting with file-level encryption software.
Disk-level encryption software encrypts data on the fly. This is why data contained in the backup is
not encrypted. Disk-level encryption software often modifies system areas: boot records, or partition
tables, or file system tables. These factors affect disk-level backup and recovery, the ability of the
recovered system to boot and access to Acronis Secure Zone.
Under some conditions, Acronis Backup is compatible with the following disk-level encryption
software:
Microsoft BitLocker Drive Encryption
McAfee Endpoint Encryption
PGP Whole Disk Encryption.
To ensure reliable disk-level recovery, follow the common rules and software-specific
recommendations.
Common installation rule
The strong recommendation is to install the encryption software before installing Acronis Backup.
The way of using Acronis Secure Zone
Acronis Secure Zone must not be encrypted with disk-level encryption. This is the only way to use
Acronis Secure Zone:
1. Install encryption software; then, install Acronis Backup.
2. Create Acronis Secure Zone.
3. Exclude Acronis Secure Zone when encrypting the disk or its volumes.
Common backup rule
You can do a disk-level backup in the operating system. Do not try to back up using bootable media
or Acronis Startup Recovery Manager.
Software-specific recovery procedures
Microsoft BitLocker Drive Encryption
To recover a system that was encrypted by BitLocker:
1. Boot from the bootable media.
