Data storage company Pivot3 has raised another $4 million in funding from Northleaf Capital Partners. This round of funding adds to the company’s recent $25 million in Series D round of funding which was led by Focus Ventures with existing investors InterWest Partners, Lightspeed Venture Partners, Mesirow Financial Capital Partners IX, and Silver Creek Ventures participating. This brings the startup’s total funding to over $79 million.

Pivot3′s storage solutions offer integrated server virtualization for data to enterprise customers. Its RAID-based solutions are generally used to store video surveillance data. The company has over 140 customers including Port of Seattle, the Mall of America, and the City of Trenton.