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NULL Device Driver

The NULL device driver does not implement access to any mass storage device. It is a dummy driver used to create gaps in the drive letter assignment. Any number of dummy drives using the NULL device driver can be used.

RTFDevice.DeviceType

RTFDevice.DeviceType must be set to RTF_DEVICE_FLOPPY.

RTFDevice.DeviceNumber

This field is ignored and should be set to 0, even if several NULL devices are used.

RTFDevice.DeviceFlags

The NULL device driver does not define any device dependent device flags. All device independent flags documented in section Device List are supported.

RTFDevice.Driver

This field must point to RTFDrvNULL.

RTFDevice.DriverData

The NULL device driver does not define any data structure. This field should be set to NULL.

Device Drivers

USB Disk Driver