Solution : https://service.sap.com/sap/support/notes/653083 (SAP Service marketplace login required)
Key words :
matchother terms origloga origlogb mirrloga mirrlogb reason, alter database clear unarchived logfile group <log>, partially executed log switch preceding database errors, '$sapdata_home/origloga/log_g<log>m1, online log <log> thread 1, online redo log <log>, current online redo logs, recovery session canceled due, log sequence number <existing>, redo log errors
Related Notes :
| 491160 | Restore scenarios for lost files of oracle databases |