Solution : https://service.sap.com/sap/support/notes/52252 (SAP Service marketplace login required)
Key words : 
<sid><sid> = database system idin, logical logs -> databases caution, additional key words reorganization, user <sid>adm, short-term basis, ontape option '-a', complete level 0 backup, current sapdba version, '   -->     unbuffered logging            'turned, 'unbuffered logging' modeuse
Related Notes : 
       
| 41248 | SQL Error "INF-1802: Connection name in use." | 
| 22941 | Reorganization of tables and dbspaces! |