Solution : https://service.sap.com/sap/support/notes/458553 (SAP Service marketplace login required)
Key words : 
cd51016608     nt/hp-ux/sni                              cd51016609     aix/dec/linux/sun, root operating system user     <cd-mount>/unix/<platform>/sdbinst -, bad indexes auto save log function, directory \sapserv3\general\3rdparty\sapdb\oltp_versions\73, file /usr/spool/sql/ini/sap_dbtech, <sid>adm operating system user    <cd-drive>, start -> programs -> sap r3 setup <sid>, <cd-mount>/unix/aix5_64/sdbinst -, /usr/spool/sql/ini directory, directory /usr/spool/sql/ini
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