Let's assume you backed up the system and boot volumes (or the entire machine) and want to recover these volumes to a different platform. The ability of the recovered system to boot up depends on the following factors:
All other operating systems are non-convertible.
When selecting not initialized target disk for recovery, this disk will be automatically initialized either to GPT or to MBR depending on the original disk partitioning style, the current boot mode (UEFI or BIOS) and the type of operating systems (convertible or non-convertible) that are located on this volume.
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 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.
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
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
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. |