Avere Systems has announced that it raised an additional $20 million in venture financing, bringing the total amount invested in the company to $72 million. The Series D funding round was led by Western Digital Capital, with participation from previous investors Lightspeed Venture Partners, Menlo Ventures, Norwest Venture Partners and Tenaya Capital. The funding will be used to accelerate sales, marketing and continued development of the company’s hybrid cloud storage solutions.