print(f"\nOrphaned roots: {len(true_roots)}")
print(f"{'inode':>12}  {'parent':>12}  {'status':>12}  {'dtime':>12}  reason")
print('-' * 75)

with open(DEV, 'rb') as f:
    for inum, parent, reason in sorted(true_roots):
        try:
            idata, slot = read_inode(f, sb, gdt_data, inum)
            status = classify_inode(idata, slot)
            dtime  = struct.unpack_from('<I', idata, slot + 20)[0]
            # Format dtime as human readable if set
            if dtime:
                import datetime
                dt = datetime.datetime.fromtimestamp(dtime).strftime('%Y-%m-%d %H:%M:%S')
            else:
                dt = 'never'
        except Exception:
            status, dt = 'unreadable', 'unknown'

        print(f"{inum:>12}  {parent:>12}  {status:>12}  {dt:>19}  {reason}")