Sun said the new model promises to offer a more space for rack-mounted units, allowing customers to choose from a broader array of the larger rack-mount networking and server devices.
The modular data systems were first unveiled by Sun in late 2006 and began shipping earlier this year. The systems tout the capabilities of a conventional datacentre contained within a single shipping container.
Because the modular systems contain all necessary power and cooling hardware, the systems are ideal for situations where a temporary datacentre is needed, such as construction projects or disaster recovery situations.
According to Sun, the modular datacenters have also been popular in developing countries, where infrastructure isn't always capable of accommodating a conventional server room.
Sun is not alone in the modular datacentre push. HP and IBM debuted shipping container-based systems not long after Sun brought its first offerings to the market.
The company hopes that its newest offering will again separate it from competitors by giving customers a larger array of configurations and uses for the datacenters, particularly systems that require large amounts of storage.