| Sat Nov 25 17:03:39 2023
 ALTER DATABASE RECOVER  database  
 Media Recovery Start
  started logmerger process
 Parallel Media Recovery started with 40 slaves
 Sat Nov 25 17:03:40 2023
 Recovery of Online Redo Log: Thread 1 Group 7 Seq 27220 Reading mem 0
   Mem# 0: /u01/app/oracle/oradata/redo07.log
 Sat Nov 25 17:03:41 2023
 Hex dump of (file3, block 7) intrace file/u01/app/oracle/diag/rdbms/his/his/trace/his_pr0l_52669.trc
 Corrupt block relative dba: 0x00c00007 (file3, block 7)
 Bad header found during media recovery
 Data inbad block:
  type: 124 format: 7 rdba: 0x1698b845
  last change scn: 0x4fa1.3eaa638f seq: 0x6 flg: 0x24
  spare1: 0x26 spare2: 0x42 spare3: 0x0
  consistency value intail: 0xa39e1e01
  check value inblock header: 0x2ca4
  computed block checksum: 0x3b25
 Reading datafile '/u01/app/oracle/oradata/undotbs01.dbf'forcorruption at rdba: 0x00c00007 (file3, block 7)
 Reread (file3, block 7) found same corrupt data (no logical check)
 Sat Nov 25 17:03:41 2023
 Hex dump of (file46, block 3) intrace file/u01/app/oracle/diag/rdbms/his/his/trace/his_pr0w_52691.trc
 Corrupt block relative dba: 0x0b800003 (file46, block 3)
 Bad header found during media recovery
 Data inbad block:
  type: 7 format: 7 rdba: 0x77922022
  last change scn: 0xdff3.c40df5b6 seq: 0x6f flg: 0xe5
  spare1: 0xcd spare2: 0x6d spare3: 0x83d7
  consistency value intail: 0x63c63d2c
  check value inblock header: 0xf662
  computed block checksum: 0xec49
 Data inbad block:
  type: 135 format: 4 rdba: 0x45ad2864
  last change scn: 0x9d7e.34949c73 seq: 0x32 flg: 0x3e
  spare1: 0x89 spare2: 0x0 spare3: 0x9f9f
  consistency value intail: 0xa5807800
  check value inblock header: 0xb2c9
  computed block checksum: 0x3aea
 Reread (file5, block 11259) found same corrupt data (no logical check)
  type: 214 format: 1 rdba: 0x0228dbe9
 Bad header found during media recovery
  last change scn: 0xed57.ca4f7559 seq: 0x9b flg: 0x4a
 Data inbad block:
  spare1: 0x97 spare2: 0x77 spare3: 0x2bab
  type: 33 format: 6 rdba: 0x018d584a
  consistency value intail: 0x359f90d6
  last change scn: 0xaeb8.2fa361eb seq: 0x60 flg: 0x92
  check value inblock header: 0x6b26
  spare1: 0xea spare2: 0xe spare3: 0xb405 block checksum disabled
 Reread (file3, block 4) found same corrupt data (no logical check)
 Corrupt block relative dba: 0x0b800e61 (file46, block 3681)
 Bad header found during media recovery
 Data inbad block:
  type: 131 format: 6 rdba: 0xc7edd0fc
  last change scn: 0xd319.d0e54941 seq: 0x6f flg: 0x6d
  spare1: 0xe7 spare2: 0x82 spare3: 0x439f
  consistency value intail: 0x18dc47b6
  check value inblock header: 0xe9c8
  computed block checksum: 0x204d
 Reread (file46, block 3681) found same corrupt data (no logical check)
 Hex dump of (file1, block 2017) intrace file/u01/app/oracle/diag/rdbms/his/his/trace/his_pr10_52699.trc
 Corrupt block relative dba: 0x004007e1 (file1, block 2017)
 Bad header found during media recovery
 Data inbad block:
  type: 159 format: 2 rdba: 0x52c5b2b0
  last change scn: 0x2ed8.e0bc5af9 seq: 0x62 flg: 0xe9
  spare1: 0x81 spare2: 0x1e spare3: 0xda98
  consistency value intail: 0xc5753dd3
  check value inblock header: 0x2bba
  block checksum disabled
 Reading datafile '/u01/app/oracle/oradata/system01.dbf'forcorruption at rdba: 0x004007e1 (file1, block 2017)
 Reread (file1, block 2017) found same corrupt data (no logical check)
 Media Recovery failed with error 742
 Errors infile/u01/app/oracle/diag/rdbms/his/his/trace/his_pr00_52622.trc:
 ORA-00283: recovery session canceled due to errors
 ORA-00742: Log readdetects lost write inthread %d sequence %d block %d
 ORA-00312: online log 7 thread 1: '/u01/app/oracle/oradata/redo07.log'
 ORA-10877 signalled during: ALTER DATABASE RECOVER  database  ...
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