Acronis Backup for PC - User Guide - Manual (Page 116)

116 Copyright © Acronis International GmbH, 2002-2014
Original
system Target hardware
BIOS UEFI
UEFI
OS: non-
convertible
The target disk will be initialized as the
source one (GPT).
The target machine must support UEFI.
Additional steps
1. Turn on the UEFI mode in BIOS.
2. Boot from a bootable media, and
perform the recovery.
Recovery to large disks in BIOS
After a recovery to a BIOS-based system, the target system disk is initialized as MBR. Because of disk
size limitations in BIOS, if the disk is larger than 2 TB, only the first 2 TB of disk space will be available
for use. If the machine supports UEFI, you can overcome this limitation by turning on the UEFI mode
and then performing the recovery. The disk is initialized as GPT. The 2-TB limitation for GPT disks
does not exist.
5.3 Acronis Active Restore
Active Restore is the Acronis proprietary technology that brings a system online immediately after its
recovery is started.
Limitations

Active Restore is meant for instant data recovery on the same machine. It is not available when
recovering to dissimilar hardware.

The only supported archive location is a local drive, or more precisely, any device available
through the machine’s BIOS. This may be Acronis Secure Zone, a USB hard drive, a flash drive or
any internal hard drive.

Active Restore does not support disks with the GPT partitioning style as a source being recovered,
as a recovery destination, or as an archive location. This also means that Unified Extensible
Firmware Interface (UEFI) is not supported. The only supported boot mode is BIOS.
How it works
When configuring a recovery operation, you select disks or volumes to recover from a backup.
Acronis Backup scans the selected disks or volumes in the backup. If this scan finds a supported
operating system, use of Acronis Active Restore becomes available.
If you do not enable Active Restore, the system recovery will proceed in the usual way and the
machine will become operational after the recovery is completed.
If you enable Active Restore, the sequence of actions will be set as follows.
Once the system recovery is started, the operating system boots from the backup. The machine
becomes operational and ready to provide necessary services. The data required to serve incoming
requests is recovered with the highest priority; everything else is recovered in the background.
Because serving requests is performed simultaneously with recovery, the system operation can slow
down even if recovery priority (p. 128) in the recovery options is set to Low. Although the system
downtime is minimal, there may be reduced performance during recovery.