Table 189

+=============-========================-=============+
|    Code     |  Description           |  Support    |
|-------------+------------------------+-------------|
|    000b     |  Blocks                |  Mandatory  |
|    001b     |  Filemarks             |  Mandatory  |
|    010b     |  Sequential filemarks  |  Optional   |
|    011b     |  End-of-data           |  Optional   |
|    100b     |  Setmarks              |  Optional   |
|    101b     |  Sequential setmarks   |  Optional   |
| 110b - 111b |  Reserved              |             |
+====================================================+