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.
1 A single operating system disk (C drive) which is backed by a .VHD file stored as page blobs in an Azure storage account. 2  A single temporary local disk (D drive). 3  This drive is backed by the local disks on the host that runs your virtual machine (VM). 4  Any data on this disk could be lost after a reboot.