The way the SCSI layer is implemented in Linux, fsync() (for that matter O_SYNC I/O) doesn't really flush data to the non-volatile platter on disk. Too much of

The way the SCSI layer is implemented in Linux, fsync() (for that matter O_SYNC I/O) doesn't really flush data to the non-volatile platter on disk. Too much of a performance hit if it did that all the time. http://thecodeartist.blogspot.com/2012/08/hdd-filesystems-osync.html http://thecodeartist.blogspot.com/2012/08/hdd-filesystems-os...