Acronis Backup for PC - User Guide - Manual (Page 114)

114 Copyright © Acronis International GmbH, 2002-2014
If the initialization may result in bootability loss, the software takes the partitioning style from
the source volume ignoring the target disk size. In such cases, the software can select the MBR
partitioning style for disks whose size is more than 2 TB; however, the disk space beyond 2 TB
will not be available for use.
If required, you can initialize the target disk manually by using the Disk management (p. 175)
functionality.
The following table summarizes whether it is possible to retain the system bootability when
recovering boot and system volumes of a BIOS-based system to UEFI-based and back.

A green background means that the system will be bootable. No user action is required.

A yellow background means that you need to perform additional steps to make the system
bootable. These steps are not possible on some machines.

A red background means that the system will not be able to boot due to BIOS and UEFI platform
limitations.
Original
system Target hardware
BIOS
Disk: MBR
BIOS
Disk: GPT
UEFI
Disk: MBR
UEFI
Disk: GPT
BIOS
OS:
convertible
Solution
Recover the operating
system to an MBR disk
or to an uninitialized
disk.
The target machine
must support BIOS.
Additional steps
1. Before recovery,
turn off the UEFI
mode in BIOS
2. Perform the
recovery under the
bootable media.
or
After recovery, turn off
the UEFI mode in BIOS.
The convertible OS
will be automatically
converted to support
UEFI booting.
BIOS
OS: non-
convertible
Solution
Recover the
operating system to
an MBR disk or to an
uninitialized disk.
UEFI
OS:
convertible
The convertible OS
will be automatically
converted to support
BIOS booting.
The target machine
must support UEFI.
Additional steps
1. Before recovery,
turn on the UEFI
mode in BIOS.
2. Perform the
recovery under the
bootable media.
or
After recovery, turn on
the UEFI mode in BIOS.
Solution
Recover the operating
system to a GPT disk or
to an uninitialized disk.
UEFI
OS: non-
convertible
Solution
Recover the operating
system to a GPT disk
or to an uninitialized
disk.
5.2.2 Recovering disks
Let's assume you backed up a whole disk (with all its volumes) and want to recover this disk to a
different target platform.