This method returns after all modified data and attributes of this FileDescriptor have been written to the relevant device(s). The documentation to sync states: Force all system buffers to synchronize with the underlying device.
This is useful for ensuring that critical information is not lost in the event of a system crash. If this channel's file resides on a local storage device then when this method returns it is guaranteed that all changes made to the file since this channel was created, or since this method was last invoked, will have been written to that device. I supposed that c.force(true) togehter with s.getFD().sync() should be sufficient because the doc for force states Forces any updates to this channel's file to be written to the storage device that contains it. I tried this code with NIO: FileOutputStream s = new FileOutputStream(filename)
How can data written to a file really be flushed/synced with the block device by Java.
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