4Blox, a San Jose, Calif. software company seeking to improve iSCSI storage area networks (SAN) performance, said it raised a round of private equity funding led by Flywheel Ventures.

The round amount was undisclosed.

In a statement, the company said the following:

4Blox is a start-up venture that develops software products that lower the host CPU communications overhead associated with iSCSI-based storage area networks. The most important hardware resource for efficiently handling increased load in iSCSI processing is CPU capacity. iSCSI-based SANs experience severe system performance degradation when used on virtualized servers, with large numbers of users or with bandwidth intensive applications – like backup and video. The core product from 4Blox is a set of software components used to expand CPU processing capacity in iSCSI SANs.