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The following control codes are used with changer devices.
| Value | Meaning |
|---|---|
| IOCTL_CHANGER_EXCHANGE_MEDIUM | Moves a piece of media from a source element to one destination, and the piece of media originally in the first destination to a second destination. |
| IOCTL_CHANGER_GET_ELEMENT_STATUS | Retrieves the status of all elements or a specified number of elements of a particular type. |
| IOCTL_CHANGER_GET_PARAMETERS | Retrieves the parameters of the specified device. |
| IOCTL_CHANGER_GET_PRODUCT_DATA | Retrieves the product data for the specified device. |
| IOCTL_CHANGER_GET_STATUS | Retrieves the current status of the specified device. |
| IOCTL_CHANGER_INITIALIZE_ELEMENT_STATUS | Initializes the status of all elements or the specified elements of a particular type. |
| IOCTL_CHANGER_MOVE_MEDIUM | Moves a piece of media to a destination. |
| IOCTL_CHANGER_QUERY_VOLUME_TAGS | Retrieves the volume tag information for the specified elements. |
| IOCTL_CHANGER_REINITIALIZE_TRANSPORT | Physically recalibrates a transport element. |
| IOCTL_CHANGER_SET_ACCESS | Sets the state of the device's insert/eject port, door, or keypad. |
| IOCTL_CHANGER_SET_POSITION | Sets the changer's robotic transport mechanism to the specified element address. |
The following control codes are used with device management.
| Control code | Operation |
|---|---|
| IOCTL_STORAGE_CHECK_VERIFY | Checks for change in a removable-media device. |
| IOCTL_STORAGE_EJECT_MEDIA | Ejects media from a SCSI device. |
| IOCTL_STORAGE_EJECTION_CONTROL | Enables or disables the mechanism that ejects media. |
| IOCTL_STORAGE_GET_DEVICE_NUMBER | Retrieves the device type, device number, and, for a partitionable device, the partition number of a device. |
| IOCTL_STORAGE_GET_HOTPLUG_INFO | Retrieves the hotplug configuration of the specified device. |
| IOCTL_STORAGE_GET_MEDIA_SERIAL_NUMBER | Retrieves the serial number of a USB device. |
| IOCTL_STORAGE_GET_MEDIA_TYPES | Retrieves the geometry information of the device. |
| IOCTL_STORAGE_GET_MEDIA_TYPES_EX | Retrieves information about the types of media supported by a device. |
| IOCTL_STORAGE_LOAD_MEDIA | Loads media into a device. |
| IOCTL_STORAGE_MANAGE_DATA_SET_ATTRIBUTES | |
| IOCTL_STORAGE_MCN_CONTROL | Enables or disables media change notification. |
| IOCTL_STORAGE_MEDIA_REMOVAL | Enables or disables the media eject mechanism. |
| IOCTL_STORAGE_READ_CAPACITY | Retrieves the geometry information for the device. |
| IOCTL_STORAGE_SET_HOTPLUG_INFO | Sets the hotplug configuration of the specified device. |