>See man fsync >and also O_DIRECT if you need specific "to disk" support Probably the most common way to get the simple but slow write function where the write() call actually writes to stable storage, and fails if it can't, is the O_SYNC open flag. But even that, in some versions of Linux, can miss write errors. It's not easy for Linux to catch them because the code that sees the I/O fail doesn't know if it's part of some synchronous procedure where the user will eventually find out about the error or the more common case where the application has optimistically walked away and nothing can be done but write off the loss. -- Bryan Henderson IBM Almaden Research Center San Jose CA Filesystems - : send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html