2.1.3.1 FILE_OBJECTID_BUFFER Type 1
The first possible structure for the FILE_OBJECTID_BUFFER data element is as follows.
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ObjectId (16 bytes) |
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BirthVolumeId (16 bytes) |
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BirthObjectId (16 bytes) |
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DomainId (16 bytes) |
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ObjectId (16 bytes): A 16-byte GUID that uniquely identifies the file or directory within the volume on which it resides. Specifically, the same object ID can be assigned to another file or directory on a different volume, but it MUST NOT be assigned to another file or directory on the same volume.
BirthVolumeId (16 bytes): A 16-byte GUID that uniquely identifies the volume on which the object resided when the object identifier was created, or zero if the volume had no object identifier at that time. After copy operations, move operations, or other file operations, this value is potentially different from the object identifier of the volume on which the object presently resides.
BirthObjectId (16 bytes): A 16-byte GUID value containing the object identifier of the object at the time it was created. Copy operations, move operations, or other file operations MAY change the value of the ObjectId member. Therefore, the BirthObjectId is potentially different from the ObjectId member at present. Specifically, the same object ID MAY be assigned to another file or directory on a different volume, but it MUST NOT be assigned to another file or directory on the same volume. The object ID is assigned at file creation time.<5>
DomainId (16 bytes): A 16-byte GUID value containing the domain identifier. This value is unused; it SHOULD be zero, and MUST be ignored.<6>