leUSN             915 fs/ntfs/layout.h 		/* 64*/	leUSN usn;		/* Last update sequence number
leUSN              93 fs/ntfs/usnjrnl.h /*0x18*/leUSN lowest_valid_usn;	/* Lowest valid usn in $DATA/$J for the
leUSN             168 fs/ntfs/usnjrnl.h /*0x18*/leUSN usn;		/* The usn of this record.  Equals the offset