VDC_Read

This command must always be supported. It transfers the size bytes from the device into the buffer. The number of bytes successfully transferred must be returned. Position is defined only if VDF_RandomAccess is set.

This is a list of error codes and their descriptions:

• ERROR_HANDLE_EOF. No more data is available.
  
  
• ERROR_NO_DATA_DETECTED. No more data is available. Microsoft® SQL Server™ handles this error and ERROR_HANDLE_EOF in a similar fashion.
  
  
• ERROR_FILEMARK_DETECTED. This error occurs when attempting to read past a filemark. For more information, see End of Media and Unexpected Filemarks.