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STATUS_HV_PARTITION_TOO_DEEP
The partition tree is deeper than the hypervisor will support
STATUS_HV_PARTITION_TOO_DEEP is about partition hierarchy, not about the number of virtual processors or the amount of guest memory. Hyper-V organizes execution environments as partitions, with a root or parent partition creating and controlling child partitions. Nested virtualization can introduce another layer, but the resulting hierarchy still has implementation limits.
This status usually points to an attempt to create or expose a partition below an already nested environment, or to a management stack that is treating a nested guest as though it had the same rights as a root virtualization host.
What to inspect
- The parent/child chain of partitions at the time of the create or setup request.
- Whether the VM already runs with nested virtualization enabled.
- Which layer owns the hypervisor interface: the physical host, a nested host, or a user-mode WHP client.
- Whether a container, emulator, security product, or test harness is adding another virtualization layer.
Useful distinction
STATUS_HV_PARTITION_TOO_DEEP differs from invalid partition identity or state statuses. The requested partition relationship can be syntactically valid and still exceed the hierarchy that this Hyper-V configuration is prepared to expose.
References
- Microsoft: Hyper-V architecture
- Microsoft: Windows Hypervisor Platform API
- Microsoft: Hyper-V TLFS
- Linux kernel documentation: Hyper-V overview
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