EMC has re-signed Fujitsu Siemens Computer (FSC) as a reseller of EMC disk storage products. This comes just days after Fujitsu, the owner of FSC, announced the world's first 300GB enterprise class hard drive. The extended supply agreement between EMC and FSC will last through to 2008.

So why isn't FSC taking Fujitsu storage products instead of EMC's? It does use Fujitsu drives but for storage products goes for EMC's Clariion, resold as FibreCAT, and also Symmetrix, Celerra file servers and Centera fixed content arrays.

In fact, it is EMC's largest reseller of Symmetrix products. To demonstrate the warmth of the relationship, EMC has been named "Supplier of the Year" by FSC. The two companies will showcase each other's products at CeBIT.

Adrian Hammerstein, FSC's president and CEO, said: "EMC's networked storage systems and software are key components of our business critical computing solutions." He emphasises that EMC and FSC are working together "at all levels, from engineering to sales and service."

Garry Owen, head of enterprise marketing for FSC, said: "We certainly do use drives from Fujitsu. The EMC agreement is for drive subsystems or entire systems like Symmetrix. We use Fujitsu drives as part of the family from notebooks to PCs and servers."

But why doesn't FSC take Fujisu storage systems?

Owen told us: "Fujitsu storage systems in some senses are similar to EMC's. We don't market them as a rule in Europe for two reasons."

The first is to do with an inherited Siemens/EMC contract. Fujitsu owns half of FSC with Siemens owning the other half. Siemens negotiated a supply contract with EMC before Fujitsu came on the scene and FSC inherited the contract.

The second reason is that (although), "Fujitsu storage subsystem products are world-class, the difference is they're really designed to work with other Fujitsu products, revolving mostly around mainframes. The EMC products are designed for heterogeneous environments," which is the market FSC sells into.

So now you know.