I would start by validating the archived redo log on the primary. That should help determine a direction for the solution and establish whether the corruption is primary or a network artifact. -----Original Message----- From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Krishna Sent: Monday, July 02, 2012 6:57 AM To: Oracle List Subject: Standby Log corruption -- in Recover phase Hi All, I am trying to set up RAC to RAC dataguard between 2 databases in different data centers. I am able to ship archivelogs from primary to DR. The logs are not getting applied. In the standby alert log -- I see the following errors (several of these CORRUPTION DETECTED Errors) *CORRUPTION DETECTED: In redo blocks starting at block 4097count 2048 for thread 4 sequence 15019* RFS[1185]: Possible network disconnect with primary database *Deleted Oracle managed file +FR1/drdb/archivelog/2012_07_02/thread_4_seq_15019.578.787560321* RFS[1186]: Possible network disconnect with primary database Mon Jul 02 06:45:36 2012 RFS[1189]: Assigned to RFS process 5016 RFS[1189]: Opened log for thread 2 sequence 12872 dbid 832151255 branch 782279895 *CORRUPTION DETECTED: In redo blocks starting at block 1count 2048 for thread 2 sequence 12872 Deleted Oracle managed file +FR1/drdb/archivelog/2012_07_02/thread_2_seq_12872.578.787560337* Mon Jul 02 06:45:38 2012 another thing is -- I have any another application, where there is dataguard from RAC to single instance. For this I dont see any problem.. can anybody throw some light on this problem? Thanks in advance.. Krishna -- //www.freelists.org/webpage/oracle-l -- //www.freelists.org/webpage/oracle-l