set_drive_state
int set_drive_state(int driveno, enum drivestate state, enum setstateflags flags);
set_drive_state(rqe->driveno, /* take the drive down */
set_drive_state(drive->driveno, drive_down, setstate_force);
set_drive_state(drive->driveno, drive_up, setstate_force); /* our drive is accessible */
set_drive_state(driveno, drive_down, setstate_force); /* tell it what's what */
set_drive_state(drive->driveno, drive_down, setstate_force);
status = set_drive_state(objindex, drive_up, flags);
status = set_drive_state(objindex, drive_down, data->force);