Although there are 50 pins in the plug, the mating receptacle need contain only 44 pins (the removal of pins 5 and 6 provides room for the wall of the receptacle). The first four pins of the connector plug located on the device are not to be connected to the host, as they are reserved for manufacturers use. Pins 5, 6 are keys, and are removed.
| Pin | Name | Dir | Description |
|---|---|---|---|
| 1 | Vendor specific | ||
| 2 | Vendor specific | ||
| 3 | Vendor specific | ||
| 4 | Vendor specific | ||
| 5 | keypin | ||
| 6 | keypin |
Note: Direction is Controller relative Devices (harddisks).
correct
incorrect