An offshore well drilling system for drilling a subsea well, including a floating platform, an external riser extending from the subsea well, and an internal riser extending from the subsea well to the platform. The closure is made from a peelable film coupled to a brim included in the container and configured to be removed from the brim in response to application of shear force applied to the peelable film. The one of the opposite, non-parallel surfaces is non-adjoined with the other of the opposite, non-parallel surfaces in the pellet. The two layers are then sealed together across the open mouths to close the chambers and retain the gas in them. According to one embodiment described in more detail below, there is provided a method and apparatus for optimally transferring packet data across contexts in a commodity operating system. The method includes controlling gain of a seek control loop to vary depending on a torque constant temperature compensation value corresponding to a measured temperature of the hard disk drive, the seek control loop generating a seek driving current to be applied to a voice coil in the seek mode.