... >Support 12 SAS or SATA Hot-swapped HDD. 5>7 full-high expansion slot2.specificationsS2121AspecificationMaterial InformationMaterialSGCCThicknessT=1.2D ×W ×H(mm ... for company,high strength count2Using for internet( Web , Mail ,file server,database,online case server)3Virtual server, ASP ,server network access4Network storage. 2U Rackmount Server Case(S2121A)