CPLD as adapter for high-availability drive management
Abstract:
An information handling system includes a storage device having control inputs, and first and second processing nodes. The first processing node includes a first complex programmable logic device (CPLD) having first outputs and a first communication interface. Each first output is coupled to control a state of an associated control input. The second processing node includes a second CPLD having second outputs and a second communication interface coupled to the first communication interface. Each second output is coupled to control the state of the associated control input. The first CPLD receives a command to change the state of a particular one of the control inputs from a first state to a second state, directs the second CPLD to change the state of the particular control input from the first state to the second state via the first communication interface, and changes the state of the particular control input from the first state to the second state in response to directing the second CPLD to change the state of the particular control input.
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