I'm having a bit of usage trouble on Windows 2008 Server R2. I'm able to execute a sequential read test just fine, but sequential writes are not working. There aren't any actual writes happening. fio doesn't return any errors, it just doesn't report any write activity to the screen. Here are the contents of my config file: [rw] rw=write ioengine=windowsaio direct=1 iodepth=256 blocksize=256K filename=\\.\PhysicalDrive1 Anyone have some ideas for me? Is there some kind of write protect active by default in Windows? I've never seen anything like this in Linux. Thanks -- To unsubscribe from this list: send the line "unsubscribe fio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html