Solution : https://service.sap.com/sap/support/notes/1704754 (SAP Service marketplace login required)
Key words : 
space requirement /oracle/<dbsid>/sapdata1    3 gb /oracle/<dbsid>/sapdata2   18 gb /oracle/<dbsid>/sapdata3   11 gb /oracle/<dbsid>/sapdata4    1 gb sum 33 gb java systems, space requirement /oracle/<dbsid>/sapdata1    1 gb /oracle/<dbsid>/sapdata2    2 gb /oracle/<dbsid>/sapdata3    1 gb /oracle/<dbsid>/sapdata4    5 gb sum 9 gb note, high availability contents date       section      description--------------------------------------------------------------------16/feb/12    2      aix, file/data_units/export_1/db/ora/dbsize, file/data_units/java_export/db/ora/dbsize, makefileduring oracle runinstaller installation01/apr/08    3      oui 10, /instguides -> sap business suite applications -> sap scmnote, unix oracle -specific problems discovered, sapinst reports db connect failure, ===================================================================== 2  pre-installation ===================================================================== disk space requirements
Related Notes : 
       
| 1704753 | Inst.Systems based on NetWeaver 7.3 and higher: UNIX | 
| 1552840 | OBSOLETE: Inst. SAP NetWeaver 7.3 EHP1 - UNIX |