How to ensure all data has been physically written to disk?

Question

I understand that .NET FileStream\'s Flush method only writes the current buffer to disk, but dependent on Windows\' disk driver and the hard disk firmware this is no guaran

Answer 1

I've noticed that the .NET 4 #Flush(true) doesn't actually write to the disk. We were having strange issues with corrupted data and I found this bug report on the MS site:

The details tab for the bug report has a test program you can run that will show the issue;

1. Write a bunch of data to disk
2. fs.Flush(true). This takes no time (much faster than can possibly written to the disk).
3. Use the win32 API FlushFileBuffers. This takes a long time.

I'm changing over to the win32 FlushFileBuffers call...