Knowledge Base

When trying to mount an image of over 2 TB in size, Acronis True Image errors out with "Cannot assign a drive letter"

This article applies to:

• Acronis True Image Home 2009
• Acronis True Image 11 Home
• Acronis True Image Echo Server for Windows
• Acronis True Image Echo Enterprise Server
• Acronis True Image Echo Workstation
• Acronis True Image for Microsoft Windows Small Business Server

Symptoms

1. Using Acronis True Image you are trying to mount an image of a disk or partition of over 2 Terabytes in size;
2. Acronis True Image fails to mount the image with an error message similar to the following one:

Cannot assign a drive letter

Alternatively, the mounting can be successful, but the mounted disk is of unexpectedly small size and cannot be accessed.

Cause

When mounting, Acronis True Image emulates the image as a partition of an MBR disk (even if the image is of a dynamic disk). MBR disks do not support partitions larger than 2 terabytes.

Solution

You can restore separate files or folders from the image if this is what you would like to mount the image for.

More information

This is a known issue. It will be fixed in future. Unfortunately, there is no specific date for the fix.

See also Maximum Volume Size Supported by Acronis Software.