Solution : https://service.sap.com/sap/support/notes/369670 (SAP Service marketplace login required)
Key words :
additional key words dbv dbverify undo migration corrupt corruption system datafile, case dbv reports corrupt undo blocks, run $oracle_home/rdbms/admin/u0703040, block type = undo data blockerror, aligned addr=000a593cundo blk header, block structure ofsegments / blocks created, alter rollback segment <rollback_segment_name> shrink, 'delete/insert/update' system, verify system datafile, rec offset-------------------------------------------------------------------0x00 0x07e8
Related Notes :
| 354293 | DBVerify reports corrupt block in freespace area |
| 181201 | Problems during migration to 8.1.x |