Who is mainstorconcept? We are a company based in Germany, with over 15 years experience in mainframe and storage concepts. Our extensive portfolio, which covers all known storage providers for disk and tape, has become our edge in this industry, as we are able to provide tailored solutions which meet the needs of our customers, big and small. Since 2005 mainstorconcept is a recognized service provider with a keen interest in mainframe and open systems integration.