BugZero | Veeam BugID kb1883 - Unable to mount disk: unsupported disk type

BugZero | Veeam BugID kb1883 - Unable to mount disk: unsupported disk type

Veeam - Defect ID: kb1883

Unable to mount disk: unsupported disk type

Veeam - Defect ID: kb1883

Unable to mount disk: unsupported disk type

Last updated on May 6th, 2026

BugZero Risk Score
9.9 High

Overall: 9.9

Severity: 10.0

Community: 9.3

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Bug Details

Views: 27

Description

Challenge

When attempting to perform a Guest Files (Windows) Restore the operation fails with the following error: Unable to mount disk: unsupported disk type

Solution

It is critical that the Microsoft Windows File Recovery page in the user guide is reviewed to confirm restore compatibility. There are specific requirements listed in the user guide regarding restores from volumes using ReFS or Data Deduplication. The following steps should only be performed after confirming that the volumes of the backed-up server are compatible with the Mount Server, per the considerations and limitations documented in the user guide.

More Information

Other Guest Files (Windows) Restore messages:

Change history

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Relevant Products

Click on a version to see all relevant bugs

Affected versions:12.3.1, 13, 12.3, 12, 12.2, 12.3.2, 12.1

Fixed versions: No known fixed versions

Relevant Products

Click on a version to see all relevant bugs

Affected versions:12.3.1, 13, 12.3, 12, 12.2, 12.3.2, 12.1

Fixed versions: No known fixed versions

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