Barium swallow is a dedicated test of the pharynx, oesophagus, and proximal stomach, and may be performed as a single or double contrast study.arium swallow is a dedicated test of the pharynx, oesophagus, and proximal stomach, and may be performed as a single or double contrast study.
up vote 9 down vote accepted. In Windows Azure Virtual Machine for Windows you can find drive C and D. Drive C is the boot OS disk and the size is actually the size of your VHD you have either uploaded or configured from the Gallery.
Thus, a âC: driveâ today might only refer to a very small portion of a much larger disk that houses several additional drive letters. With the proliferation of computers came exploitation by malicious hackers, malware, viruses and spyware. The C: drive is the common target because it is the default drive for installation of the operating system. For this reason some people with an eye for security choose to create a small C: drive to hold a few DOS utilities and other files, but install the main operating system on the D: drive.