- You want to restore a backup or clone your hard drive to a larger one
- The new drive is larger than 2 TB.
- You can successfully clone your drive to the new one.
- You notice that you can only use up to 2 TB of space on the new drive, the rest is inaccessible.
The cloned/restored drive has MBR partitioning. MBR is an older partition structure that only supports drives of up to 2 TB in capacity. Convert the disk into GPT format to be able to use the disk space beyond 2 TB.
Check if your operating system supports GPT disk format:
Windows XP 32-bit does not support GPT neither for system, nor for data drives.
Windows 7 32-bit supports GPT format only for data drives. It is not able from boot GPT disks in the required UEFI mode.
Windows 7 64-bit and all versions of Windows 8, 8.1 and 10 all support GPT drives both as system and data drives.
You can find more information about Microsoft Windows support for disks larger than 2 TB in the corresponding article by Microsoft.
Windows XP 64-bit and any version of Windows Vista are not supported by Acronis True Image .
There are two possible ways to get the disk in question into the GPT format to allow usage of more than 2 TB:
Switch to UEFI boot mode
Only if the >2TB disk holds an operating system, follow instructions at https://neosmart.net/wiki/enable-uefi-boot/ to check if your computer supports UEFI booting and actually switch to UEFI mode. If you have not find any of the options listed in the mentioned article for enabling UEFI booting, probably your computer does not support UEFI - consult the computer manufacturer. In that case you will be able to use the disk space beond 2 TB only on a non-system drive.
If the >2TB disk is for storing just data, skip and proceed to the next step below.
Initialize the drive as GPT and repeat the cloning/recovery
- Boot the computer with Acronis bootable media in UEFI mode. You should see a black screen with white text on it as shown on the picture below. If you do not see it and a graphical colorful boot menu is displayed instead, you have booted into Legacy BIOS mode. See instructions from the above section on how to switch to UEFI mode.
- On the keyboard, press 1.
- Once Acronis True Image is loaded, navigate to Tools & Utilities:
- Click Add New Disk:
- Select your new drive. Pay attention to the Capacity column and make sure you are selecting the correct drive:
- A warning appears stating that all data on the selected drive will be deleted. Click OK:
- Select Initialize disk in GPT layout:
- Skip the partition creation step. Click Next:
- Review the summary and click Proceed:
- Click OK:
- Repeat the cloning or recovery
If you feel comfortable working in command line and have Windows 10 version 1703 or newer, you can use MBR2GPT.EXE converter from Microsoft to convert an MBR drive to GPT. Click here for instructions. The tool converts the disk both in offline and online modes, without requiring to repeat the cloning or recovery procedure. It could be a time-saver if the original drive or backup are very large and cloning and recovery would take a long time. After conversion, you can extend disk partitions beyond 2 TB as explained here.
To find out the version number of your Windows, open the Windows Start menu, type winver and press Enter on the keyboard. Version number will be written after the word Version.
Please note that MBR2GPT.EXE belongs to Microsoft and Acronis holds no responsibility for any consequences of using it.