====== Dummy files ======
Dummy files can be very helpful in a Server environment. 
For example, having a 5 GB dummy file on the log and database partitions of an Exchange Server will help you resolve a space issue quickly. Simply delete the dummy file, and then you’d have some time to address the issue properly.

Use below Windows Commands to create dummy files in a size of your choice.
1 GB dummy file (1024*1024*1024=1073741824):
<code>fsutil file createnew dummy.file 1073741824</code>

5 GB dummy file (1024*1024*1024*5=5368709120):
<code>fsutil file createnew dummy.file 5368709120</code>