Are you receiving this error message in device manager?
Code 27
Windows can't specify the resources for this device. (Code 27)
Click the Resources tab, and then select the basic configuration for the resources this device uses. To see which resources this device uses, see the documentation for this device.
Solution button: None
This code means that the portion of the registry describing possible resources for a device does not contain valid entries. For example, the device is marked as configurable, but the configuration information in the .inf file is set to hardwired.
To resolve this error code, use Device Manager to remove the device and then run the Add New Hardware tool in Control Panel. If the device still does not work, consult the hardware manufacturer for updated drivers or further assistance.
Or if you are trying to read the drive with another program, or scan the drive, Code 27 can mean no media inserted....