Recently the DS3000 became available. This is the answer of IBM for the Entry-level storage market competing directly with HPQ MSA1000, HPQ MSA1500 and Dell/EMC AX150.  A lot of information on these products can be found on IBM Partnerworld. Make sure you have an IBM ID to logon and get your hands on the available information including the DS3000 Interoperability Matrix with 35 sample configurations and DS3000 Simulator.  Updated: Feb 14th --> added link to interop. guide on the internet