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# fDataTransferDirection

The direction for the caller to send data to or receive data from the device.

```
uint8_t fDataTransferDirection;
```

## Discussion

Use the following `DriverKit/storage/SCSITask.h` direction values to populate this field:

- <doc://com.apple.documentation/documentation/iokit/1534749-data_transfer_direction/kscsidatatransfer_nodatatransfer>
- <doc://com.apple.documentation/documentation/iokit/1534749-data_transfer_direction/kscsidatatransfer_frominitiatortotarget>
- <doc://com.apple.documentation/documentation/iokit/1534749-data_transfer_direction/kscsidatatransfer_fromtargettoinitiator>

---

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