Table 171

+=====-========-========-========-========-========-========-========-========+
|  Bit|   7    |   6    |   5    |   4    |   3    |   2    |   1    |   0    |
|Byte |        |        |        |        |        |        |        |        |
|=====+========+========+=====================================================|
| 0   |   PS   |Reserved|         Page code (04h)                             |
|-----+-----------------------------------------------------------------------|
| 1   |                           Page length (16h)                           |
|-----+-----------------------------------------------------------------------|
| 2   | (MSB)                                                                 |
|- - -+---                        Number of cylinders                      ---|
| 4   |                                                                 (LSB) |
|-----+-----------------------------------------------------------------------|
| 5   |                           Number of heads                             |
|-----+-----------------------------------------------------------------------|
| 6   | (MSB)                                                                 |
|- - -+---               Starting cylinder-write precompensation           ---|
| 8   |                                                                 (LSB) |
|-----+-----------------------------------------------------------------------|
| 9   | (MSB)                                                                 |
|- - -+---               Starting cylinder-reduced write current           ---|
| 11  |                                                                 (LSB) |
|-----+-----------------------------------------------------------------------|
| 12  | (MSB)                                                                 |
|-----+---                        Drive step rate                          ---|
| 13  |                                                                 (LSB) |
|-----+-----------------------------------------------------------------------|
| 14  | (MSB)                                                                 |
|- - -+---                        Landing zone cylinder                    ---|
| 16  |                                                                 (LSB) |
|-----+-----------------------------------------------------------------------|
| 17  |                           Reserved                  |       RPL       |
|-----+-----------------------------------------------------------------------|
| 18  |                           Rotational offset                           |
|-----+-----------------------------------------------------------------------|
| 19  |                           Reserved                                    |
|-----+-----------------------------------------------------------------------|
| 20  | (MSB)                                                                 |
|-----+---                        Medium rotation rate                     ---|
| 21  |                                                                 (LSB) |
|-----+-----------------------------------------------------------------------|
| 22  |                           Reserved                                    |
|-----+-----------------------------------------------------------------------|
| 23  |                           Reserved                                    |
+=============================================================================+