Abstract: A method, apparatus and computer-readable medium for adjusting Predictive Failure Analysis (PFA) polling rates based on a temperature of an electronic device is presented. In one embodiment, the method includes the steps of by recognizing the danger that high temperatures pose to the HDD, adjusts PFA polling rates. In one embodiment, the invention includes the steps of setting a maximum temperature at which an electronic device (for example, a hard disk drive) can operate without damage; measuring a temperature of the electronic device; and increasing a frequency of Predictive Failure Analysis (PFA) operations as the temperature of the electronic device approaches the maximum temperature. The PFA operations include, but are not limited to, polling performance data that is being collected in real-time for the electronic device.

Abstract: A method and system are disclosed to enable and control power reduction in a blade/chassis system. A “maximum power reduction” attribute is stored in the VPD of the blade (or can otherwise be input to or retrieved or calculated by the management entity). The management module of the chassis in which the blades and power supplies are located uses this information to manage the power reduction of blades when the system is operating in an over-subscription mode and a power supply fails. If throttling is required, the system knows the amount of power reduction available for each blade and controls the throttling by spreading it out among the blades in the system so that, ideally, no blade will cease operation altogether.

Abstract: Power is allocated to blades based on an estimate of the actual power they are expected to use rather than their maximum-power draw-value. To protect against situations where the estimated actual-power draw-value is exceeded, a hardware comparator monitors the blade system load against a predetermined threshold value set by a management module (MM) based on user input. If this threshold value is exceeded, a throttle latch is triggered, based on a signal from a service processor monitoring the blade system load. The output of this latch directly engages throttling. The service processor also monitors the output of the latch and communicates information regarding the throttling to the MM for evaluation.

Abstract: A simple, but intelligent watchdog circuit uses an up/down counter for its delay element. A watchdog event will occur if the counter is allowed to over flow or under flow its boundaries (in either direction). The system objective is to keep the counter within its boundaries by controlling the direction of the count. The count direction is simply a function of the Most Significant Bit (MSB) of the counter. Thus, the system must simply monitor the counters MSB and perform a little intelligent to determine the desired count direction.

Abstract: An intelligent multistation access unit is provided having a transmission speed detection circuit for determining the data transmission speed of an attached device attempting to gain access to a node of a multiple transmission rate digital data communications network. The intelligent multistation access unit is comprised of a speed detect circuit, which indicates the data transmission speed of the attached device, a switching circuit which directs the attached device to the speed detect circuit until switched to allow the attached device access to the network node, and a processor that controls the switching circuit and which permits the attached device access to the node depending on the data transmission speed indication.

Abstract: An intelligent multistation access unit is provided having a transmission speed detection circuit for determining the data transmission speed of an attached device attempting to gain access to a node of a multiple transmission rate digital data communications network. The intelligent multistation access unit is comprised of a speed detect circuit, which indicates the data transmission speed of the attached device, a switching circuit which directs the attached device to the speed detect circuit until switched to allow the attached device access to the network node, and a processor that controls the switching circuit and which permits the attached device access to the node depending on the data transmission speed indication.

Abstract: An intelligent multistation access unit is provided having a transmission speed detection circuit for determining the data transmission speed of an attached device attempting to gain access to a node of a multiple transmission rate digital data communications network. The intelligent multistation access unit is comprised of a speed detect circuit, which indicates the data transmission speed of the attached device, a switching circuit which directs the attached device to the speed detect circuit until switched to allow the attached device access to the network node, and a processor that controls the switching circuit and which permits the attached device access to the node depending on the data transmission speed indication.