'Given a list of disks in the format returned by get_disk_list() above,
set the I/O scheduler values on all the disks to the values loaded
earlier by load_sched_tunables().'

def set_sched_tunables(self, disks):

    for dx in range(len(disks)):
        disk = disks[dx]['tunable']
        self.set_tunable(disk, 'scheduler', self.tune_loc['scheduler'], 'cfq')
        for tune_desc in self.tune_list:
            self.set_tunable(disk, tune_desc[0], tune_desc[1], tune_desc[2])
