NtReplacePartitionUnit - NtDoc

#ifndef _NTPNPAPI_H

NTSYSCALLAPI
NTSTATUS
NTAPI
NtReplacePartitionUnit(
    _In_ PCUNICODE_STRING TargetInstancePath,
    _In_ PCUNICODE_STRING SpareInstancePath,
    _In_ ULONG Flags
    );

#endif
View code on GitHub

#ifndef _NTZWAPI_H

NTSYSCALLAPI
NTSTATUS
NTAPI
ZwReplacePartitionUnit(
    _In_ PCUNICODE_STRING TargetInstancePath,
    _In_ PCUNICODE_STRING SpareInstancePath,
    _In_ ULONG Flags
    );

#endif
View code on GitHub