Solution : https://service.sap.com/sap/support/notes/401721 (SAP Service marketplace login required)
Key words : 
---------------------------------------------------------------------- ix/ chronological summary date      topic     short description ----------------------------------------------------------------------19/apr/05, -----------------------< d020904 mar/18/02 >-------------------------------------< changed d020847 mar/18/02 >------------------dbchk_pre phaseif, / important general information    ii/ free space required, next_extent 2560 kb--------------------------------------------------------------------- ii/ free space required, script \usr\sap\put\bin\oragetnls, -----------------------< d019527 jul/20/00 >---------------------------------------------<supplemented d019527 jan/02/02 >---------------------, prepare ----------------------- < d020847 22/jul/02 >-------------------------shdbinst_sdb_chk phase / dbchk_pre, file$oracle_home/dbs/init<sid>, file $oracle_home/dbs/init<sid>, extending next_extents storage parameters20/jul/00
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