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ERROR_SVHDX_WRONG_FILE_TYPE
Shared access has a format requirement
ERROR_SVHDX_WRONG_FILE_TYPE means the requested shared-virtual-disk configuration does not use a supported fixed or dynamic VHDX disk. This is a capability check made before the storage is exposed for multi-consumer shared access. It is not a signal that the data inside the file system is corrupt and it cannot be fixed by changing an ACL, reformatting a guest volume, or retrying the mount.
The important distinction is between the virtual-disk object that is being shared and its visible file name. A familiar extension is not enough evidence of support. The Hyper-V and remote virtual-disk layers need a disk type that supplies the semantics required for shared access; selecting another image format or an unsupported virtual-disk type can fail even when an individual virtual machine can otherwise attach and use that file privately.
What to verify
- Inspect the virtual hard disk’s reported format and disk type through Hyper-V or the management API rather than relying only on the file extension.
- Confirm that the shared-disk workflow is using the disk object intended for shared access, not a snapshot, temporary file, or other storage artifact.
- Check the host and guest-cluster deployment model. Shared VHDX was designed for guest-cluster storage and has deployment restrictions that differ from ordinary attached VHDX disks.
- Plan conversion or replacement as a storage migration operation with application-consistent backup and rollback, not as an in-place rename.
Why this is separate from version mismatch
This status rejects the selected disk type or format. ERROR_SVHDX_VERSION_MISMATCH instead concerns compatibility between the client request and the server implementation. A valid fixed or dynamic VHDX can still encounter a version mismatch, and compatible versions do not make an unsupported file type shareable.
References
- Microsoft Open Specifications: Remote Shared Virtual Disk Protocol
- Microsoft: Virtual Hard Disk Sharing Overview
- Microsoft Open Specifications: VHDX format
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