Solution : https://service.sap.com/sap/support/notes/135207 (SAP Service marketplace login required)
Key words : 
function module -> test -> single test, bc sap database administration guide, transaction se14 --> 'goto'-->'storage parameters', goto -> storage parameters, multiple virtual storage, import parameter iv_devc, export parameter ev_incb, unload/load utility, homogenous system copy, system copy offline
Related Notes : 
       
| 558453 | DB2/390: Choice of partitioning key | 
| 188992 | DB2/390: Upgrade: Partitioned tables | 
| 184555 | DB2/390: A table gets too large - what can be done? | 
| 162818 | DB2/390: DDIC corrections (4.5A,4.5B) | 
| 122599 | DB2/390: Performance of the update | 
| 96515 | DB2/390: Isolating large tables and table clusters | 
| 78354 | DB2/390: Conversion of partitioned tables |