SanDisk Ventures, the corporate venturing unit of SanDisk, a US-based provider of flash storage, has invested an undisclosed amount in Nexenta Systems, a US-based provider of software-defined storage (SDS). Previously, in March 2013, Nexenta raised $24m in its series D round from a consortium including Japan-based conglomerate Sumitomo and chip maker UMC’s corporate venturing units. In January 2011, Nexenta raised $21m in its C round.