This site describes the systems deployed at the German Climate Computing Centre.
DKRZ hosts the Mistral supercomputer which is tightly coupled with two Lustre file systems. We have some small compute and supporting infrastructure that may access the storage of Mistral and a large HPSS system.
The DKRZ system was procured in two phases that are roughly have the same size. The storage of the first phase consisted of ClusterStor 9000 storage devices and the second phase of ClusterStor L300 equipped with Seagate Enterprise Capacity V5 disks (8 TB, ST8000NM0095).
Initially, we planned of creating one big shared file system, but now are using two file systems (one for the storage of phase 1 and one for phase 2). Both file systems are mounted on all compute nodes.