Does flush() safely write to disk on Windows?

From problems with a 'C' application on Windows 2000 & XP
that lost file data after a power failure even though it had called
flush() lots of time. We discovered that Microsoft requires a 'c'
flag on fopen() in order for a flush() call to to actually cause a write to disk.
This is non-ANSI behaviour and I wondered whether Sun's JVM
on Windows actually opened files using this flag on fopen().
From trials using W2K & FAT32 with JDK 1.3.0 (Java 2 Standard Edition
(build 1.3.0-C) the answer appears to be no, however, using NTFS the
data is still present after a power fauilure.
Does anyone know whether the Windows JVMs do pass this 'c' flag
to fopen() or use another method to ensure that flush() actually does
what it is supposed to. Any information would be appreciated. If
a change has been made in later VM's I'd like to know the version
it was fixed in.
Thanks
Steve

I'm sorry I'm not giving any juke dollars for a one word answer!
Eventually after searching the bug database on this site I found
that bug 4266941 'in progress, bug' has documented the problem
of a File flush() call not doing what you would expect. In case
anyone is interested the documented workaround seems to work for us.
That is File.flush() followed by FileDescriptor.sync().
I was a little surprised that (for our application) this major
flaw with flush() has received so little mention anywhere.
Regards
Steve

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Paragraphs help the reader, just saying.
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Hello Mikets ,
Welcome to the HP Forums.
I see that you are having connectivity issues with the scanning portion of the printer.
I suggest we try the HP Printer Install Wizard for Windows.
Write me back and let me know if this helped or not.
If the troubleshooting does not help resolve your issue and you would like to seek more options, I would then suggest calling HP's Technical Support to see about further options for you. If you are calling within North America, the number is 1-800-474-6836 and for all other regions, click here: click here.
Thanks for your time.
Cheers,
Click the “Kudos Thumbs Up" at the bottom of this post to say “Thanks” for helping!
Please click “Accept as Solution ” if you feel my post solved your issue, it will help others find the solution.
W a t e r b o y 71
I work on behalf of HP

Does flush() safely write to disk on Windows?

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