硬件恢复之后,数据库无法open故障恢复

联系：手机/微信(+86 17813235971) QQ(107644445)QQ咨询惜分飞

标题：硬件恢复之后,数据库无法open故障恢复

作者：惜分飞©版权所有[未经本人同意,不得以任何形式转载,否则有进一步追究法律责任的权利.]

由于硬件故障,客户恢复硬件之后,数据库无法正常启动,报ORA-00354 ORA-00353错误

/tmp/> sqlplus / as sysdba

SQL*Plus: Release 11.2.0.3.0 Production on Mon Mar 1 17:10:30 2021

Copyright (c) 1982, 2011, Oracle.  All rights reserved.


Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options

SQL> recover database;

ORA-00283: recovery session canceled due to errors
ORA-00354: corrupt redo log block header
ORA-00353: log corruption near block 86088 change 16135545783340 time
02/23/2021 13:53:24
ORA-00312: online log 2 thread 1: '/oradata02/redo02b.log'
ORA-00312: online log 2 thread 1: '/oradata01/redo02a.log'

由于redo损坏,数据库无法继续正常恢复,通过屏蔽一致性,force open库

SQL> alter database open resetlogs;
alter database open resetlogs 
*
ERROR at line 1:
ORA-01092: ORACLE instance terminated. Disconnection forced
ORA-00704: bootstrap process failure
ORA-00704: bootstrap process failure
ORA-00600: internal error code, arguments: [2662], [3756], [3571444619], [3756], [3648471803], [4194545]
Process ID: 5104
Session ID: 576 Serial number: 3

这个错误比较简单,是由于scn问题导致,修改数据库scn启动库

SQL> alter database open;
alter database open
*
ERROR at line 1:
ORA-01092: ORACLE instance terminated. Disconnection forced
ORA-00600: internal error code, arguments: [4193], [], [], [], [], [], []
Process ID: 5536
Session ID: 576 Serial number: 1

这个错误比较明显，修改回滚段，尝试启动库

SQL> alter database open;
alter database open
*
ERROR at line 1:
ORA-03113: end-of-file on communication channel
Process ID: 6033
Session ID: 576 Serial number: 3

数据库依旧无法正常open,alert日志报错如下

ARC3 started with pid=30, OS id=6078 
ARC1: Archival started
ARC2: Archival started
ARC1: Becoming the 'no FAL' ARCH
ARC1: Becoming the 'no SRL' ARCH
ARC2: Becoming the heartbeat ARCH
Exception[type:SIGSEGV Address not mapped to object][ADDR:0x60173487F5][PC:0xC003B1C20,_memcpy()+64][flags:0x0,count:1]
Exception[type:SIGSEGV,Address not mapped to object][ADDR:0x60173487F5][PC:0xC003B1C20,_memcpy()+64][flags:0x2,count:2]
Exception[type:SIGSEGV,Address not mapped to object][ADDR:0x60173487F5][PC:0xC003B1C20,_memcpy()+64][flags:0x2,count:2]
Archived Log entry 2 added for thread 1 sequence 2 ID 0x506cafbb dest 1:
ARC3: Archival started
ARC0: STARTING ARCH PROCESSES COMPLETE
Mon Mar 01 17:44:44 2021
PMON (ospid: 5993): terminating the instance due to error 397
Mon Mar 01 17:44:45 2021
System state dump requested by (instance=1, osid=5993 (PMON)), summary=[abnormal instance termination].
System State dumped to trace file /oracle/diag/rdbms/xff/xff/trace/xff_diag_6001.trc
Instance terminated by PMON, pid = 5993

通过其启动过程分析,发现数据库卡在如下对象：

PARSING IN CURSOR #11529215044940435280 len=148 dep=1 uid=0 oct=6 lid=0 tim=223080942765 
hv=3540833987 ad='c000000d67a42778' sqlid='5ansr7r9htpq3'
update undo$ set name=:2,file#=:3,block#=:4,status$=:5,user#=:6,undosqn=:7,xactsqn=:8,
scnbas=:9,scnwrp=:10,inst#=:11,ts#=:12,spare1=:13 where us#=:1
END OF STMT
PARSE #11529215044940435280:c=10000,e=8182,p=6,cr=55,cu=0,mis=1,r=0,dep=1,og=4,plh=0,tim=223080942764
BINDS #11529215044940435280:
 Bind#0
  oacdty=01 mxl=32(20) mxlc=00 mal=00 scl=00 pre=00
  oacflg=18 fl2=0001 frm=01 csi=873 siz=32 off=0
  kxsbbbfp=c000000d5fd299aa  bln=32  avl=20  flg=09
  value="_SYSSMU1_3935275865$"
 Bind#1
  oacdty=02 mxl=22(22) mxlc=00 mal=00 scl=00 pre=00
  oacflg=08 fl2=0001 frm=00 csi=00 siz=24 off=0
  kxsbbbfp=9fffffffbcc6e078  bln=24  avl=02  flg=05
  value=3
 Bind#2
  oacdty=02 mxl=22(22) mxlc=00 mal=00 scl=00 pre=00
  oacflg=08 fl2=0001 frm=00 csi=00 siz=24 off=0
  kxsbbbfp=9fffffffbcc6e048  bln=24  avl=03  flg=05
  value=128
 Bind#3
  oacdty=02 mxl=22(22) mxlc=00 mal=00 scl=00 pre=00
  oacflg=08 fl2=0001 frm=00 csi=00 siz=24 off=0
  kxsbbbfp=9fffffffbcc6e010  bln=24  avl=02  flg=05
  value=5
 Bind#4
  oacdty=02 mxl=22(22) mxlc=00 mal=00 scl=00 pre=00
  oacflg=08 fl2=0001 frm=00 csi=00 siz=24 off=0
  kxsbbbfp=9fffffffbcc6dfe0  bln=24  avl=02  flg=05
  value=1
 Bind#5
  oacdty=02 mxl=22(22) mxlc=00 mal=00 scl=00 pre=00
  oacflg=08 fl2=0001 frm=00 csi=00 siz=24 off=0
  kxsbbbfp=9fffffffbcc6dfb0  bln=24  avl=04  flg=05
  value=28921
 Bind#6
  oacdty=02 mxl=22(22) mxlc=00 mal=00 scl=00 pre=00
  oacflg=08 fl2=0001 frm=00 csi=00 siz=24 off=0
  kxsbbbfp=9fffffffbcc6df80  bln=24  avl=05  flg=05
  value=1245262
 Bind#7
  oacdty=02 mxl=22(22) mxlc=00 mal=00 scl=00 pre=00
  oacflg=08 fl2=0001 frm=00 csi=00 siz=24 off=0
  kxsbbbfp=9fffffffbcc6df48  bln=24  avl=06  flg=05
  value=1217986655
 Bind#8
  oacdty=02 mxl=22(22) mxlc=00 mal=00 scl=00 pre=00
  oacflg=08 fl2=0001 frm=00 csi=00 siz=24 off=0
  kxsbbbfp=9fffffffbcc6dc90  bln=24  avl=03  flg=05
  value=3621
 Bind#9
  oacdty=02 mxl=22(22) mxlc=00 mal=00 scl=00 pre=00
  oacflg=08 fl2=0001 frm=00 csi=00 siz=24 off=0
  kxsbbbfp=9fffffffbcc6dc60  bln=24  avl=01  flg=05
  value=0
 Bind#10
  oacdty=02 mxl=22(22) mxlc=00 mal=00 scl=00 pre=00
  oacflg=08 fl2=0001 frm=00 csi=00 siz=24 off=0
  kxsbbbfp=9fffffffbcc6dc30  bln=24  avl=02  flg=05
  value=2
 Bind#11
  oacdty=02 mxl=22(22) mxlc=00 mal=00 scl=00 pre=00
  oacflg=08 fl2=0001 frm=00 csi=00 siz=24 off=0
  kxsbbbfp=9fffffffbcc6dc00  bln=24  avl=02  flg=05
  value=2
 Bind#12
  oacdty=02 mxl=22(22) mxlc=00 mal=00 scl=00 pre=00
  oacflg=08 fl2=0001 frm=00 csi=00 siz=24 off=0
  kxsbbbfp=9fffffffbcc6e0a8  bln=22  avl=02  flg=05
  value=1
WAIT #11529215044940435280: nam='db file sequential read' ela= 21 file#=1 block#=530 blocks=1 obj#=0 tim=223080944352
Incident 528204 created, dump file: /oracle/diag/rdbms/xff/xff/incident/incdir_528204/xff_ora_6593_i528204.trc
ORA-00600: internal error code, arguments: [4193], [], [], [], [], [], [], [], [], [], [], []

至此基本上可以确认是由于出现回滚段异常,继续查看日志发现

Error 600 in redo application callback
Dump of change vector:
TYP:0 CLS:16 AFN:1 DBA:0x00400212 OBJ:4294967295 SCN:0x0ea6.f4f2da14 SEQ:1 OP:5.1 ENC:0 RBL:0
ktudb redo: siz: 320 spc: 5892 flg: 0x0012 seq: 0x0072 rec: 0x08
            xid:  0x0000.004.000000bc  
ktubl redo: slt: 4 rci: 0 opc: 11.1 [objn: 15 objd: 15 tsn: 0]
Undo type:  Regular undo        Begin trans    Last buffer split:  No 
Temp Object:  No 
Tablespace Undo:  No 
             0x00000000  prev ctl uba: 0x00400212.0072.07 
prev ctl max cmt scn:  0x0eac.d42963be  prev tx cmt scn:  0x0eac.d4296f48 
txn start scn:  0xffff.ffffffff  logon user: 0  prev brb: 4194446  prev bcl: 0 BuExt idx: 0 flg2: 0
KDO undo record:
KTB Redo 
op: 0x04  ver: 0x01  
compat bit: 4 (post-11) padding: 1
op: L  itl: xid:  0x0000.060.000000bb uba: 0x00400212.0072.04
                      flg: C---    lkc:  0     scn: 0x0eac.d9736b46
KDO Op code: URP row dependencies Disabled
  xtype: XA flags: 0x00000000  bdba: 0x004000e1  hdba: 0x004000e0
itli: 4  ispac: 0  maxfr: 4863
tabn: 0 slot: 1(0x1) flag: 0x2c lock: 0 ckix: 0
ncol: 17 nnew: 12 size: 0
col  1: [20]  5f 53 59 53 53 4d 55 31 5f 33 39 33 35 32 37 35 38 36 35 24
col  2: [ 2]  c1 02
col  3: [ 2]  c1 04
col  4: [ 3]  c2 02 1d
col  5: [ 6]  c5 0d 12 63 43 38
col  6: [ 3]  c2 25 16
col  7: [ 5]  c4 02 19 35 3f
col  8: [ 4]  c3 03 5a 16
col  9: [ 1]  80
col 10: [ 2]  c1 04
col 11: [ 2]  c1 03
col 16: [ 2]  c1 03
Block after image is corrupt: 
buffer tsn: 0 rdba: 0x00400212 (1/530)
scn: 0x0ea6.f4f2da14 seq: 0x01 flg: 0x04 tail: 0xda140201
frmt: 0x02 chkval: 0x9dd8 type: 0x02=KTU UNDO BLOCK

使用bbed对file 1 block 530进行处理

   struct ktuxcscn, 8 bytes                 @4148    
      ub4 kscnbas                           @4148     0xd42963be
      ub2 kscnwrp                           @4152     0x0eac
   struct ktuxcuba, 8 bytes                 @4156    
      ub4 kubadba                           @4156     0x00400212
      ub2 kubaseq                           @4160     0x0072
      ub1 kubarec                           @4162     0x07
   sb2 ktuxcflg                             @4164     1 (KTUXCFSK)
   ub2 ktuxcseq                             @4166     0x0072
   sb2 ktuxcnfb                             @4168     1
   ub4 ktuxcinc                             @4172     0x00000000
   sb2 ktuxcchd                             @4176     4
   sb2 ktuxcctl                             @4178     3
   ub2 ktuxcmgc                             @4180     0x8002
   ub4 ktuxcopt                             @4188     0x7ffffffe

数据库顺利open成功
20210301210425

后续建议客户逻辑导出数据,导入到新库

ORA-00742 ORA-00312 故障恢复

联系：手机/微信(+86 17813235971) QQ(107644445)QQ咨询惜分飞

标题：ORA-00742 ORA-00312 故障恢复

作者：惜分飞©版权所有[未经本人同意,不得以任何形式转载,否则有进一步追究法律责任的权利.]

12.1.0.1的由于硬件故障，恢复文件之后，导致redo写丢失，数据库数据库无法正常启动
报错ORA-00742 ORA-00312

Mon Feb 22 17:07:48 2021
alter database open
Mon Feb 22 17:07:48 2021
Beginning crash recovery of 1 threads
 parallel recovery started with 3 processes
Mon Feb 22 17:07:48 2021
Started redo scan
Mon Feb 22 17:07:49 2021
Slave encountered ORA-10388 exception during crash recovery
Mon Feb 22 17:07:49 2021
Slave encountered ORA-10388 exception during crash recovery
Mon Feb 22 17:07:49 2021
Slave encountered ORA-10388 exception during crash recovery
Mon Feb 22 17:07:51 2021
Aborting crash recovery due to error 742
Mon Feb 22 17:07:51 2021
Errors in file D:\APP\ADMINISTRATOR\diag\rdbms\orcl12c\orcl12c\trace\orcl12c_ora_4624.trc:
ORA-00742: 日志读取在线程 1 序列 4035 块 44165 中检测到写入丢失情况
ORA-00312: 联机日志 3 线程 1: 'D:\APP\ADMINISTRATOR\ORADATA\ORCL12C\REDO03.LOG'
Mon Feb 22 17:07:51 2021
Errors in file D:\APP\ADMINISTRATOR\diag\rdbms\orcl12c\orcl12c\trace\orcl12c_ora_4624.trc:
ORA-00742: 日志读取在线程 1 序列 4035 块 44165 中检测到写入丢失情况
ORA-00312: 联机日志 3 线程 1: 'D:\APP\ADMINISTRATOR\ORADATA\ORCL12C\REDO03.LOG'
ORA-742 signalled during: alter database open...

通过屏蔽一致性,强制resetlogs方式打开库报ORA-600 2662错误

Mon Feb 22 17:27:38 2021
Checker run found 17 new persistent data failures
alter database open resetlogs 
Mon Feb 22 17:27:54 2021
RESETLOGS is being done without consistancy checks. This may result
in a corrupted database. The database should be recreated.
RESETLOGS after incomplete recovery UNTIL CHANGE 102879654
Resetting resetlogs activation ID 762781739 (0x2d77202b)
Mon Feb 22 17:27:59 2021
Setting recovery target incarnation to 4
Mon Feb 22 17:28:00 2021
Assigning activation ID 895702933 (0x35635795)
Starting background process TMON
Mon Feb 22 17:28:00 2021
TMON started with pid=26, OS id=4204 
Thread 1 opened at log sequence 1
  Current log# 1 seq# 1 mem# 0: D:\APP\ADMINISTRATOR\ORADATA\ORCL12C\REDO01.LOG
Successful open of redo thread 1
Mon Feb 22 17:28:00 2021
MTTR advisory is disabled because FAST_START_MTTR_TARGET is not set
Mon Feb 22 17:28:00 2021
SMON: enabling cache recovery
Errors in file D:\APP\ADMINISTRATOR\diag\rdbms\orcl12c\orcl12c\trace\orcl12c_ora_4804.trc  (incident=21657):
ORA-00600: 内部错误代码, 参数: [2662], [0], [102879661], [0], [102879857], [20971648], [], [], [], [], [], []
Incident details in: D:\APP\ADMINISTRATOR\diag\rdbms\orcl12c\orcl12c\incident\incdir_21657\orcl12c_ora_4804_i21657.trc
Use ADRCI or Support Workbench to package the incident.
See Note 411.1 at My Oracle Support for error and packaging details.
Mon Feb 22 17:28:06 2021
Errors in file D:\APP\ADMINISTRATOR\diag\rdbms\orcl12c\orcl12c\trace\orcl12c_ora_4804.trc:
ORA-00600: 内部错误代码, 参数: [2662], [0], [102879661], [0], [102879857], [20971648], [], [], [], [], [], []
Mon Feb 22 17:28:06 2021
Errors in file D:\APP\ADMINISTRATOR\diag\rdbms\orcl12c\orcl12c\trace\orcl12c_ora_4804.trc:
ORA-00600: 内部错误代码, 参数: [2662], [0], [102879661], [0], [102879857], [20971648], [], [], [], [], [], []
Mon Feb 22 17:28:06 2021
Error 600 happened during db open, shutting down database
USER (ospid: 4804): terminating the instance due to error 600

由于scn相差的不大，重启几次后，该问题解决，后续数据库启动报ORA-600 4193

Mon Feb 22 19:53:11 2021
Database Characterset is ZHS16GBK
Starting background process SMCO
Mon Feb 22 19:53:11 2021
SMCO started with pid=28, OS id=3236 
Mon Feb 22 19:53:15 2021
Errors in file D:\APP\ADMINISTRATOR\diag\rdbms\orcl12c\orcl12c\trace\orcl12c_smon_4460.trc:
ORA-01595: 释放区 (2) 回退段 (1) 时出错
ORA-00600: 内部错误代码, 参数: [4193], [15352], [18655], [], [], [], [], [], [], [], [], []
Mon Feb 22 19:53:18 2021
Errors in file D:\APP\ADMINISTRATOR\diag\rdbms\orcl12c\orcl12c\trace\orcl12c_ora_1356.trc:
ORA-00600: 内部错误代码, 参数: [4193], [15352], [18655], [], [], [], [], [], [], [], [], []
Error 600 happened during db open, shutting down database
USER (ospid: 1356): terminating the instance due to error 600
Mon Feb 22 19:53:21 2021
Instance terminated by USER, pid = 1356
ORA-1092 signalled during: ALTER DATABASE OPEN...

处理异常undo之后，数据库启动正常，完成数据库恢复

硬件故障导致ORA-600 2662错误处理

联系：手机/微信(+86 17813235971) QQ(107644445)QQ咨询惜分飞

标题：硬件故障导致ORA-600 2662错误处理

作者：惜分飞©版权所有[未经本人同意,不得以任何形式转载,否则有进一步追究法律责任的权利.]

前几天恢复了一个40多T的CASE:ORA-00600: internal error code, arguments: [16513], [1403] 恢复,又一个近30T的库由于硬件故障,通过其他人一系列恢复之后,无法正常open,让我们提供技术支持:
故障最初原因是由于存储异常

Fri Feb 19 09:03:49 2021
Errors in file d:\app\administrator\diag\rdbms\xifenfei\xifenfei\trace\xifenfei_ora_3460.trc:
ORA-01114: 将块写入文件 849 时出现 IO 错误 (块 # 3871748)
ORA-27070: 异步读取/写入失败
OSD-04016: 异步 I/O 请求排队时出错。
O/S-Error: (OS 1167) 设备没有连接。
ORA-01114: 将块写入文件 849 时出现 IO 错误 (块 # 3871748)
ORA-27070: 异步读取/写入失败
OSD-04016: 异步 I/O 请求排队时出错。
O/S-Error: (OS 1167) 设备没有连接。

通过其他人一系列处理后,数据库报ORA-600 2662错误

Sat Feb 20 08:19:35 2021
MTTR advisory is disabled because FAST_START_MTTR_TARGET is not set
Sat Feb 20 08:19:35 2021
SMON: enabling cache recovery
Errors in file d:\app\administrator\diag\rdbms\xifenfei\xifenfei\trace\xifenfei_ora_5304.trc(incident=1960181):
ORA-00600:internal error code,arguments:[2662],[4],[2185364344], [4],[2185453722],[893388032],[],[],[],[],[],[]
Errors in file d:\app\administrator\diag\rdbms\xifenfei\xifenfei\trace\xifenfei_ora_5304.trc:
ORA-00600:internal error code,arguments:[2662],[4],[2185364344], [4],[2185453722],[893388032],[],[],[],[],[],[]
Errors in file d:\app\administrator\diag\rdbms\xifenfei\xifenfei\trace\xifenfei_ora_5304.trc:
ORA-00600:internal error code,arguments:[2662],[4],[2185364344], [4],[2185453722],[893388032],[],[],[],[],[],[]
Error 600 happened during db open, shutting down database
USER (ospid: 5304): terminating the instance due to error 600
Instance terminated by USER, pid = 5304
ORA-1092 signalled during: ALTER DATABASE OPEN...
opiodr aborting process unknown ospid (5304) as a result of ORA-1092
Sat Feb 20 08:19:42 2021
ORA-1092 : opitsk aborting process

通过对scn处理,数据库顺利绕过该错误,然后报ORA-600 4194错误

Doing block recovery for file 213 block 4688
No block recovery was needed
Errors in file d:\app\administrator\diag\rdbms\xifenfei\xifenfei\trace\xifenfei_smon_7048.trc(incident=1984136):
ORA-00600: internal error code, arguments: [4194], [38.4.1381252], [0], [], [],[],[],[],[],[],[],[]
Sat Feb 20 10:50:45 2021
Doing block recovery for file 213 block 4688
No block recovery was needed
Fatal internal error happened while SMON was doing active transaction recovery.
Errors in file d:\app\administrator\diag\rdbms\xifenfei\xifenfei\trace\xifenfei_smon_7048.trc:
ORA-00600: internal error code, arguments: [4194], [38.4.1381252], [0], [], [],[],[],[],[],[],[],[]
SMON (ospid: 7048): terminating the instance due to error 474
Errors in file d:\app\administrator\diag\rdbms\xifenfei\xifenfei\trace\xifenfei_ora_6652.trc(incident=1984185):
ORA-00600: internal error code, arguments: [4194], [], [], [], [], [], [], [], [], [], [], []
ORA-00600: internal error code, arguments: [4194], [], [], [], [], [], [], [], [], [], [], []
ORA-00600: internal error code, arguments: [4194], [], [], [], [], [], [], [], [], [], [], []
ORA-00600: internal error code, arguments: [4194], [], [], [], [], [], [], [], [], [], [], []
Sat Feb 20 10:50:52 2021
Instance terminated by SMON, pid = 7048

通过对异常事务进行处理,屏蔽smon进程进行回滚,数据库open成功,但是报ORA-600 4137错误

Sat Feb 20 10:53:46 2021
Sweep [inc][1992133]: completed
Stopping background process MMNL
Sat Feb 20 10:53:47 2021
Trace dumping is performing id=[cdmp_20210220105347]
Errors in file d:\app\administrator\diag\rdbms\xifenfei\xifenfei\trace\xifenfei_smon_6576.trc(incident=1992134):
ORA-00600: internal error code, arguments: [4137], [23.13.3094188], [0], [0], [], [], [], [], [], [], [], []
ORACLE Instance xifenfei (pid = 14) - Error 600 encountered while recovering transaction (23, 13).
Errors in file d:\app\administrator\diag\rdbms\xifenfei\xifenfei\trace\xifenfei_smon_6576.trc:
ORA-00600: internal error code, arguments: [4137], [23.13.3094188], [0], [0], [], [], [], [], [], [], [], []
Sat Feb 20 10:53:47 2021
Sweep [inc2][1992133]: completed
Sat Feb 20 10:53:47 2021
Sweep [inc][1992134]: completed
Stopping background process MMON
Trace dumping is performing id=[cdmp_20210220105348]
Errors in file d:\app\administrator\diag\rdbms\xifenfei\xifenfei\trace\xifenfei_smon_6576.trc(incident=1992135):
ORA-00600: internal error code, arguments: [4137], [38.4.1381252], [0], [0], [], [], [], [], [], [], [], []
Starting background process MMON
Starting background process MMNL
Sat Feb 20 10:53:48 2021
MMON started with pid=16, OS id=6448 
ALTER SYSTEM enable restricted session;
Sat Feb 20 10:53:48 2021
MMNL started with pid=36, OS id=6840 
ORACLE Instance xifenfei (pid = 14) - Error 600 encountered while recovering transaction (38, 4).
Errors in file d:\app\administrator\diag\rdbms\xifenfei\xifenfei\trace\xifenfei_smon_6576.trc:
ORA-00600: internal error code, arguments: [4137], [38.4.1381252], [0], [0], [], [], [], [], [], [], [], []
Sat Feb 20 10:53:49 2021
Sweep [inc][1992135]: completed
Trace dumping is performing id=[cdmp_20210220105349]
replication_dependency_tracking turned off (no async multimaster replication found)
Completed: alter database open

对异常回滚段进行处理,数据库后端启动正常,不再报明显ORA-错误.通过hcheck.sql检查字典正常

HCheck Version 07MAY18 on 20-FEB-2021 11:35:11
----------------------------------------------
Catalog Version 11.2.0.1.0 (1102000100)
db_name: JYJG

                                   Catalog       Fixed
Procedure Name                     Version    Vs Release    Timestamp
Result
------------------------------ ... ---------- -- ---------- --------------
------
.- LobNotInObj                 ... 1102000100 <=  *All Rel* 02/20 11:35:11 PASS
.- MissingOIDOnObjCol          ... 1102000100 <=  *All Rel* 02/20 11:35:11 PASS
.- SourceNotInObj              ... 1102000100 <=  *All Rel* 02/20 11:35:11 PASS
.- IndIndparMismatch           ... 1102000100 <= 1102000100 02/20 11:35:12 PASS
.- InvCorrAudit                ... 1102000100 <= 1102000100 02/20 11:35:12 PASS
.- OversizedFiles              ... 1102000100 <=  *All Rel* 02/20 11:35:12 PASS
.- PoorDefaultStorage          ... 1102000100 <=  *All Rel* 02/20 11:35:12 PASS
.- PoorStorage                 ... 1102000100 <=  *All Rel* 02/20 11:35:12 PASS
.- PartSubPartMismatch         ... 1102000100 <= 1102000100 02/20 11:35:12 PASS
.- TabPartCountMismatch        ... 1102000100 <=  *All Rel* 02/20 11:35:12 PASS
.- OrphanedTabComPart          ... 1102000100 <=  *All Rel* 02/20 11:35:12 PASS
.- MissingSum$                 ... 1102000100 <=  *All Rel* 02/20 11:35:12 PASS
.- MissingDir$                 ... 1102000100 <=  *All Rel* 02/20 11:35:12 PASS
.- DuplicateDataobj            ... 1102000100 <=  *All Rel* 02/20 11:35:12 PASS
.- ObjSynMissing               ... 1102000100 <=  *All Rel* 02/20 11:35:13 PASS
.- ObjSeqMissing               ... 1102000100 <=  *All Rel* 02/20 11:35:13 PASS
.- OrphanedUndo                ... 1102000100 <=  *All Rel* 02/20 11:35:13 PASS
.- OrphanedIndex               ... 1102000100 <=  *All Rel* 02/20 11:35:13 PASS
.- OrphanedIndexPartition      ... 1102000100 <=  *All Rel* 02/20 11:35:13 PASS
.- OrphanedIndexSubPartition   ... 1102000100 <=  *All Rel* 02/20 11:35:13 PASS
.- OrphanedTable               ... 1102000100 <=  *All Rel* 02/20 11:35:13 PASS
.- OrphanedTablePartition      ... 1102000100 <=  *All Rel* 02/20 11:35:13 PASS
.- OrphanedTableSubPartition   ... 1102000100 <=  *All Rel* 02/20 11:35:13 PASS
.- MissingPartCol              ... 1102000100 <=  *All Rel* 02/20 11:35:13 PASS
.- OrphanedSeg$                ... 1102000100 <=  *All Rel* 02/20 11:35:13 PASS
.- OrphanedIndPartObj#         ... 1102000100 <=  *All Rel* 02/20 11:35:13 PASS
.- DuplicateBlockUse           ... 1102000100 <=  *All Rel* 02/20 11:35:13 PASS
.- FetUet                      ... 1102000100 <=  *All Rel* 02/20 11:35:13 PASS
.- Uet0Check                   ... 1102000100 <=  *All Rel* 02/20 11:35:13 PASS
.- ExtentlessSeg               ... 1102000100 <= 1102000100 02/20 11:35:13 PASS
.- SeglessUET                  ... 1102000100 <=  *All Rel* 02/20 11:35:13 PASS
.- BadInd$                     ... 1102000100 <=  *All Rel* 02/20 11:35:13 PASS
.- BadTab$                     ... 1102000100 <=  *All Rel* 02/20 11:35:13 PASS
.- BadIcolDepCnt               ... 1102000100 <=  *All Rel* 02/20 11:35:13 PASS
.- ObjIndDobj                  ... 1102000100 <=  *All Rel* 02/20 11:35:13 PASS
.- TrgAfterUpgrade             ... 1102000100 <=  *All Rel* 02/20 11:35:13 PASS
.- ObjType0                    ... 1102000100 <=  *All Rel* 02/20 11:35:13 PASS
.- BadOwner                    ... 1102000100 <=  *All Rel* 02/20 11:35:13 PASS
.- StmtAuditOnCommit           ... 1102000100 <=  *All Rel* 02/20 11:35:13 PASS
.- BadPublicObjects            ... 1102000100 <=  *All Rel* 02/20 11:35:13 PASS
.- BadSegFreelist              ... 1102000100 <=  *All Rel* 02/20 11:35:13 PASS
.- BadDepends                  ... 1102000100 <=  *All Rel* 02/20 11:35:13 PASS
.- CheckDual                   ... 1102000100 <=  *All Rel* 02/20 11:35:14 PASS
.- ObjectNames                 ... 1102000100 <=  *All Rel* 02/20 11:35:14 PASS
.- BadCboHiLo                  ... 1102000100 <=  *All Rel* 02/20 11:35:14 PASS
.- ChkIotTs                    ... 1102000100 <=  *All Rel* 02/20 11:35:15 PASS
.- NoSegmentIndex              ... 1102000100 <=  *All Rel* 02/20 11:35:15 PASS
.- BadNextObject               ... 1102000100 <=  *All Rel* 02/20 11:35:15 PASS
.- DroppedROTS                 ... 1102000100 <=  *All Rel* 02/20 11:35:15 PASS
.- FilBlkZero                  ... 1102000100 <=  *All Rel* 02/20 11:35:15 PASS
.- DbmsSchemaCopy              ... 1102000100 <=  *All Rel* 02/20 11:35:15 PASS
.- OrphanedObjError            ... 1102000100 >  1102000000 02/20 11:35:15 PASS
.- ObjNotLob                   ... 1102000100 <=  *All Rel* 02/20 11:35:15 PASS
.- MaxControlfSeq              ... 1102000100 <=  *All Rel* 02/20 11:35:15 PASS
.- SegNotInDeferredStg         ... 1102000100 >  1102000000 02/20 11:35:18 PASS
.- SystemNotRfile1             ... 1102000100 >   902000000 02/20 11:35:18 PASS
.- DictOwnNonDefaultSYSTEM     ... 1102000100 <=  *All Rel* 02/20 11:35:19 PASS
.- OrphanTrigger               ... 1102000100 <=  *All Rel* 02/20 11:35:19 PASS
.- ObjNotTrigger               ... 1102000100 <=  *All Rel* 02/20 11:35:19 PASS
---------------------------------------
20-FEB-2021 11:35:19  Elapsed: 8 secs
---------------------------------------
Found 0 potential problem(s) and 0 warning(s)

PL/SQL procedure successfully completed.

Statement processed.

虽然字典正常,但是由于数据库屏蔽了一致性,建议客户在条件允许的情况下,进行逻辑迁移,排除风险隐患.

ORA-00600: internal error code, arguments: [16513], [1403] 恢复

联系：手机/微信(+86 17813235971) QQ(107644445)QQ咨询惜分飞

标题：ORA-00600: internal error code, arguments: [16513], [1403] 恢复

作者：惜分飞©版权所有[未经本人同意,不得以任何形式转载,否则有进一步追究法律责任的权利.]

接到客户请求,存储异常断电之后,一个40多T的经分数据库无法正常启动,通过各方一系列操作之后,数据库依旧无法open,报错信息为:ORA-00600: internal error code, arguments: [16513], [1403], [28]
20210214193332

Sun Feb 14 00:20:09 BEIST 2021
SMON: enabling cache recovery
Sun Feb 14 00:20:09 BEIST 2021
ORA-01555 caused by SQL statement below (SQL ID: 4krwuz0ctqxdt, SCN: 0x0f27.13cd4fc3):
Sun Feb 14 00:20:09 BEIST 2021
select ctime, mtime, stime from obj$ where obj# = :1
Sun Feb 14 00:20:09 BEIST 2021
Errors in file /oracle10g/db/admin/xifenfei/udump/xifenfei1_ora_177254.trc:
ORA-00600: internal error code, arguments: [16513], [1403], [28], [], [], [], [], []
Sun Feb 14 00:20:10 BEIST 2021
Errors in file /oracle10g/db/admin/xifenfei/udump/xifenfei1_ora_177254.trc:
ORA-00704: bootstrap process failure
ORA-00704: bootstrap process failure
ORA-00600: internal error code, arguments: [16513], [1403], [28], [], [], [], [], []
Error 704 happened during db open, shutting down database
USER: terminating instance due to error 704
Instance terminated by USER, pid = 177254
ORA-1092 signalled during: ALTER DATABASE OPEN...

通过对启动过程进行跟踪

=====================
PARSING IN CURSOR #5 len=52 dep=1 uid=0 oct=3 lid=0 tim=194171381576991 hv=429618617 ad='afcee60'
select ctime, mtime, stime from obj$ where obj# = :1
END OF STMT
PARSE #5:c=0,e=257,p=0,cr=0,cu=0,mis=1,r=0,dep=1,og=4,tim=194171381576990
BINDS #5:
kkscoacd
 Bind#0
  oacdty=02 mxl=22(22) mxlc=00 mal=00 scl=00 pre=00
  oacflg=08 fl2=0001 frm=00 csi=00 siz=24 off=0
  kxsbbbfp=1104b8ed0  bln=22  avl=02  flg=05
  value=28
EXEC #5:c=0,e=422,p=0,cr=0,cu=0,mis=1,r=0,dep=1,og=4,tim=194171381577472
WAIT #5: nam='db file sequential read' ela= 274 file#=1 block#=110 blocks=1 obj#=36 tim=194171381577809
WAIT #5: nam='db file sequential read' ela= 257 file#=1 block#=78943 blocks=1 obj#=36 tim=194171381578123
WAIT #5: nam='db file sequential read' ela= 253 file#=1 block#=111 blocks=1 obj#=36 tim=194171381578416
WAIT #5: nam='db file sequential read' ela= 226 file#=1 block#=62 blocks=1 obj#=18 tim=194171381578692
=====================
PARSING IN CURSOR #6 len=142 dep=2 uid=0 oct=3 lid=0 tim=194171381579134 hv=361892850 ad='df87eb0'
select /*+ rule */ name,file#,block#,status$,user#,undosqn,xactsqn,scnbas,scnwrp,
DECODE(inst#,0,NULL,inst#),ts#,spare1 from undo$ where us#=:1
END OF STMT
PARSE #6:c=0,e=368,p=0,cr=0,cu=0,mis=1,r=0,dep=2,og=3,tim=194171381579133
BINDS #6:
kkscoacd
 Bind#0
  oacdty=02 mxl=22(22) mxlc=00 mal=00 scl=00 pre=00
  oacflg=08 fl2=0001 frm=00 csi=00 siz=24 off=0
  kxsbbbfp=1105af9a8  bln=22  avl=02  flg=05
  value=92
EXEC #6:c=0,e=531,p=0,cr=0,cu=0,mis=1,r=0,dep=2,og=3,tim=194171381579736
WAIT #6: nam='db file sequential read' ela= 232 file#=1 block#=102 blocks=1 obj#=34 tim=194171381580011
WAIT #6: nam='db file sequential read' ela= 251 file#=1 block#=54 blocks=1 obj#=15 tim=194171381580307
FETCH #6:c=0,e=615,p=2,cr=2,cu=0,mis=0,r=1,dep=2,og=3,tim=194171381580369
STAT #6 id=1 cnt=1 pid=0 pos=1 obj=15 op='TABLE ACCESS BY INDEX ROWID UNDO$ (cr=2 pr=2 pw=0 time=584 us)'
STAT #6 id=2 cnt=1 pid=1 pos=1 obj=34 op='INDEX UNIQUE SCAN I_UNDO1 (cr=1 pr=1 pw=0 time=282 us)'
WAIT #5: nam='db file sequential read' ela= 260 file#=4290 block#=365090 blocks=1 obj#=0 tim=194171381580721
FETCH #5:c=10000,e=3327,p=7,cr=7,cu=0,mis=0,r=0,dep=1,og=4,tim=194171381580817
*** 2021-02-14 02:32:40.430
ksedmp: internal or fatal error
ORA-00600: internal error code, arguments: [16513], [1403], [28], [], [], [], [], []
Current SQL statement for this session:
alter database open
----- Call Stack Trace -----
calling              call     entry                argument values in hex      
location             type     point                (? means dubious value)     
-------------------- -------- -------------------- ----------------------------
ksedst+001c          bl       ksedst1              70000090FC00AE4 ? 000000000 ?
ksedmp+0290          bl       ksedst               104C1CA58 ?
ksfdmp+02d8          bl       03F4BD0C             
kgeriv+0108          bl       _ptrgl               
kgesiv+0080          bl       kgeriv               7000008F6DB5890 ? 00000000C ?
                                                   7000008F6DB5890 ? 0FFFFFDC3 ?
                                                   0FFFFFFBF ?
ksesic2+0060         bl       kgesiv               5FFFEC580 ? 500000000 ?
                                                   FFFFFFFFFFEC590 ? 0F5FAF808 ?
                                                   7000008F5FAF7E8 ?
kqdpts+0158          bl       ksesic2              408100004081 ? 000000000 ?
                                                   00000057B ? 000000000 ?
                                                   00000001C ?
                                                   A006150571B05EF0 ?
                                                   1100CF0A8 ? 000000001 ?
kqrlfc+0274          bl       kqdpts               000000000 ?
kqlbplc+00b4         bl       03F4E6A8             
kqlblfc+0230         bl       kqlbplc              00000009D ?
adbdrv+1a9c          bl       03F4B66C             
opiexe+2db4          bl       adbdrv               
opiosq0+1ac8         bl       opiexe               1103B418C ? 000000000 ?
                                                   FFFFFFFFFFF9008 ?
kpooprx+016c         bl       opiosq0              300F1E1D4 ? 000000000 ?
                                                   000000000 ? A4FFFFFFFF9798 ?
                                                   000000000 ?
kpoal8+03cc          bl       kpooprx              FFFFFFFFFFFB814 ?
                                                   FFFFFFFFFFFB5C0 ?
                                                   1300000013 ? 100000001 ?
                                                   000000000 ? A40000000000A4 ?
                                                   000000000 ? 1103B4378 ?
opiodr+0b2c          bl       _ptrgl               
ttcpip+1020          bl       _ptrgl               
opitsk+117c          bl       01FBD04C             
opiino+09d0          bl       opitsk               1EFFFFD7E0 ? 000000000 ?
opiodr+0b2c          bl       _ptrgl               
opidrv+04a4          bl       opiodr               3C102B1398 ? 404C6FF30 ?
                                                   FFFFFFFFFFFF7A0 ? 0102B1390 ?
sou2o+0090           bl       opidrv               3C02705B3C ? 440663000 ?
                                                   FFFFFFFFFFFF7A0 ?
opimai_real+01bc     bl       01FB9BF4             
main+0098            bl       opimai_real          000000000 ? 000000000 ?
__start+0098         bl       main                 000000000 ? 000000000 ?
 
--------------------- Binary Stack Dump ---------------------

报错比较明显,数据库在查询obj$取obj#=28的数据的时候无法正常获取到该数据,从而报错ORA-600 16513错误.通过对相关block进行分析,发现有事务异常

BBED>  p ktbbh.ktbbhitl[1]
struct ktbbhitl[1], 24 bytes                @44
   struct ktbitxid, 8 bytes                 @44
      ub2 kxidusn                           @44       0x5c00
      ub2 kxidslt                           @46       0x0a00
      ub4 kxidsqn                           @48       0x48b4fc01
   struct ktbituba, 8 bytes                 @52
      ub4 kubadba                           @52       0x22928531
      ub2 kubaseq                           @56       0xe383
      ub1 kubarec                           @58       0x01
   ub2 ktbitflg                             @60       0x0120 (NONE)
   union _ktbitun, 2 bytes                  @62
      b2 _ktbitfsc                          @62       0
      ub2 _ktbitwrp                         @62       0x0000
   ub4 ktbitbas                             @64       0x95c2ff13

通过一些技巧处理规避掉该事务,然后启动库报熟悉的ORA-01555错误
20210214161333

相对比较简单参考(在数据库open过程中常遇到ORA-01555汇总),数据库顺利open成功,完成春节后第一个大库的恢复
20210214193344

dul 12.2完美支持Oracle 19c恢复

联系：手机/微信(+86 17813235971) QQ(107644445)QQ咨询惜分飞

标题：dul 12.2完美支持Oracle 19c恢复

作者：惜分飞©版权所有[未经本人同意,不得以任何形式转载,否则有进一步追究法律责任的权利.]

Oracle dul 12.2完美支持12c+版本(实测19c恢复正常)

[root@ora11g dul]# ./dul

Data UnLoader: 12.2.0.0.0 Beta - Internal Only - on Wed Nov 11 00:00:39 2020
with 64-bit io functions and the decompression option

Copyright (c) 1994 2019 Bernard van Duijnen All rights reserved.

 Strictly Oracle Internal Use Only


Found db_id = 2193655303
Found db_name = UORA19C
DUL> bootstrap;
Probing file = 1, block = 520
. unloading table                BOOTSTRAP$
DUL: Warning: block number is non zero but marked deferred trying to process it anyhow
      60 rows unloaded
Reading BOOTSTRAP.dat 60 entries loaded
Parsing Bootstrap$ contents
DUL: Warning: Recreating file "dict.ddl"
Generating dict.ddl for version 12
 OBJ$: segobjno 18, file 1 block 240
 TAB$: segobjno 2, tabno 1, file 1  block 144
 COL$: segobjno 2, tabno 5, file 1  block 144
 USER$: segobjno 10, tabno 1, file 1  block 208
Running generated file "@dict.ddl" to unload the dictionary tables
. unloading table                      OBJ$   72485 rows unloaded
. unloading table                      TAB$    2243 rows unloaded
. unloading table                      COL$  123798 rows unloaded
. unloading table                     USER$     127 rows unloaded
Reading USER.dat 127 entries loaded
Reading OBJ.dat 72485 entries loaded and sorted 72485 entries
Reading TAB.dat 2243 entries loaded
Reading COL.dat 123798 entries loaded and sorted 123798 entries
Reading BOOTSTRAP.dat 60 entries loaded

DUL: Warning: Recreating file "dict.ddl"
Generating dict.ddl for version 12
 OBJ$: segobjno 18, file 1 block 240
 TAB$: segobjno 2, tabno 1, file 1  block 144
 COL$: segobjno 2, tabno 5, file 1  block 144
 USER$: segobjno 10, tabno 1, file 1  block 208
 TABPART$: segobjno 814, file 1 block 5424
 INDPART$: segobjno 819, file 1 block 5464
 TABCOMPART$: segobjno 836, file 1 block 5600
 INDCOMPART$: segobjno 841, file 1 block 5640
 TABSUBPART$: segobjno 826, file 1 block 5520
 INDSUBPART$: segobjno 831, file 1 block 5560
 IND$: segobjno 2, tabno 3, file 1  block 144
 ICOL$: segobjno 2, tabno 4, file 1  block 144
 LOB$: segobjno 2, tabno 6, file 1  block 144
 COLTYPE$: segobjno 2, tabno 7, file 1  block 144
 TYPE$: segobjno 740, tabno 1, file 1  block 4880
 COLLECTION$: segobjno 740, tabno 2, file 1  block 4880
 ATTRIBUTE$: segobjno 740, tabno 3, file 1  block 4880
 LOBFRAG$: segobjno 847, file 1 block 5688
 LOBCOMPPART$: segobjno 850, file 1 block 5720
 UNDO$: segobjno 15, file 1 block 224
 TS$: segobjno 6, tabno 2, file 1  block 176
 PROPS$: segobjno 127, file 1 block 1320
Running generated file "@dict.ddl" to unload the dictionary tables
. unloading table                      OBJ$
DUL: Warning: Recreating file "OBJ.ctl"
   72485 rows unloaded
. unloading table                      TAB$
DUL: Warning: Recreating file "TAB.ctl"
    2243 rows unloaded
. unloading table                      COL$
DUL: Warning: Recreating file "COL.ctl"
  123798 rows unloaded
. unloading table                     USER$
DUL: Warning: Recreating file "USER.ctl"
     127 rows unloaded
. unloading table                  TABPART$     304 rows unloaded
. unloading table                  INDPART$     204 rows unloaded
. unloading table               TABCOMPART$       1 row  unloaded
. unloading table               INDCOMPART$       0 rows unloaded
. unloading table               TABSUBPART$      32 rows unloaded
. unloading table               INDSUBPART$       0 rows unloaded
. unloading table                      IND$    2922 rows unloaded
. unloading table                     ICOL$    4996 rows unloaded
. unloading table                      LOB$     702 rows unloaded
. unloading table                  COLTYPE$    3035 rows unloaded
. unloading table                     TYPE$    5889 rows unloaded
. unloading table               COLLECTION$    1385 rows unloaded
. unloading table                ATTRIBUTE$   15376 rows unloaded
. unloading table                  LOBFRAG$      15 rows unloaded
. unloading table              LOBCOMPPART$       0 rows unloaded
. unloading table                     UNDO$      21 rows unloaded
. unloading table                       TS$      21 rows unloaded
. unloading table                    PROPS$      42 rows unloaded
Reading USER.dat 127 entries loaded
Reading OBJ.dat 72485 entries loaded and sorted 72485 entries
Reading TAB.dat 2243 entries loaded
Reading COL.dat 123798 entries loaded and sorted 123798 entries
Reading TABPART.dat 304 entries loaded and sorted 304 entries
Reading TABCOMPART.dat 1 entries loaded and sorted 1 entries
Reading TABSUBPART.dat 32 entries loaded and sorted 32 entries
Reading INDPART.dat 204 entries loaded and sorted 204 entries
Reading INDCOMPART.dat 0 entries loaded and sorted 0 entries
Reading INDSUBPART.dat 0 entries loaded and sorted 0 entries
Reading IND.dat 2922 entries loaded
Reading LOB.dat 702 entries loaded
Reading ICOL.dat 4996 entries loaded
Reading COLTYPE.dat 3035 entries loaded
Reading TYPE.dat
DUL: Notice: Increased the size of DC_TYPES from 4096 to 32768 entries
 5889 entries loaded
Reading ATTRIBUTE.dat 15376 entries loaded
Reading COLLECTION.dat
DUL: Notice: Increased the size of DC_COLLECTIONS from 1024 to 8192 entries
 1385 entries loaded
Reading BOOTSTRAP.dat 60 entries loaded
Reading LOBFRAG.dat 15 entries loaded and sorted 15 entries
Reading LOBCOMPPART.dat 0 entries loaded and sorted 0 entries
Reading UNDO.dat 21 entries loaded
Reading TS.dat 21 entries loaded
Reading PROPS.dat 42 entries loaded
Database character set is AL32UTF8
Database national character set is AL16UTF16

实际测试一张表恢复

DUL> unload table sys.props$;
. unloading table                    PROPS$
DUL: Warning: Recreating file "SYS_PROPS.ctl"
      42 rows unloaded

20201111224237

Oracle Recovery Tools恢复MISSING00000文件故障

联系：手机/微信(+86 17813235971) QQ(107644445)QQ咨询惜分飞

标题：Oracle Recovery Tools恢复MISSING00000文件故障

作者：惜分飞©版权所有[未经本人同意,不得以任何形式转载,否则有进一步追究法律责任的权利.]

前几天介绍了自己开发的Oracle Recovery Tools工具,今天有客户遇到故障,数据库由于断电无法正常启动,第三方对其进行了重建控制文件操作,但是有两个数据文件没有加入到重建控制文件脚本中,当数据库被resetlogs方式打开之后出现如下效果
20200808142132

20200808142248
数据库已经被多次resetlogs打开,这两个丢失的文件无法正常加载进去,通过Oracle Recovery Tools进行处理
20200808143542
这里可以明显看到,resetlogs scn和checkpoint scn均不一样,常规方法肯定无法处理.
20200808143640
直接在恢复库只读情况下把文件加入到数据库中
20200808142722
通过Oracle Recovery Tools点击鼠标就可以快速的解决这类问题,省去的大量的bbed处理的烦劳(在win上要去找bbed软件,要去考虑各种偏移量,修改目标值等)

重命名sys用户引起数据库启动报ORA-01092 ORA-00600 kokasgi1错误

联系：手机/微信(+86 17813235971) QQ(107644445)QQ咨询惜分飞

标题：重命名sys用户引起数据库启动报ORA-01092 ORA-00600 kokasgi1错误

作者：惜分飞©版权所有[未经本人同意,不得以任何形式转载,否则有进一步追究法律责任的权利.]

有客户和我反馈,他们为了防止有人使用sys用户进行登录,对sys用户进行了重命名,具体操作语句为:

update user$ set name='THISISSYS' where user#=0;

然后重启数据库发现数据库无法正常启动,报ORA-01092 ORA-00600 kokasgi1错误

[oracle@ecs-d75e-0618923 ~]$ sqlplus / as sysdba

SQL*Plus: Release 11.2.0.1.0 Production on Fri Aug 7 14:40:28 2020

Copyright (c) 1982, 2009, Oracle.  All rights reserved.

Connected to an idle instance.

SQL> startup mount;
ORACLE instance started.

Total System Global Area 6881345536 bytes
Fixed Size                  2214056 bytes
Variable Size            4227860312 bytes
Database Buffers         2617245696 bytes
Redo Buffers               34025472 bytes
Database mounted.
SQL> alter database open;
alter database open
*
ERROR at line 1:
ORA-01092: ORACLE instance terminated. Disconnection forced
ORA-00600: internal error code, arguments: [kokasgi1], [], [], [], [], [], [],[], [], [], [], []
Process ID: 6269
Session ID: 530 Serial number: 3

以前写过处理过类似问题,参见:ORA-600 kokasgi1故障恢复,通过特殊处理,数据库open之后,对其user#=0的用户修改为SYS.

[oracle@ecs-d75e-0618923 ~]$ sqlplus / as sysdba

SQL*Plus: Release 11.2.0.1.0 Production on Fri Aug 7 14:52:09 2020

Copyright (c) 1982, 2009, Oracle.  All rights reserved.

Connected to an idle instance.

SQL> startup mount;
ORACLE instance started.

Total System Global Area 6881345536 bytes
Fixed Size                  2214056 bytes
Variable Size            4227860312 bytes
Database Buffers         2617245696 bytes
Redo Buffers               34025472 bytes
Database mounted.
SQL> alter database open;

Database altered.

SQL> select name from user$ where user#=0;

NAME
------------------------------
THISISSYS

SQL> update user$ set name='SYS' where user#=0;

1 row updated.

SQL> commit;

Commit complete.

SQL> shutdown abort;
ORACLE instance shut down.
SQL> startup;
ORACLE instance started.

Total System Global Area 6881345536 bytes
Fixed Size                  2214056 bytes
Variable Size            4227860312 bytes
Database Buffers         2617245696 bytes
Redo Buffers               34025472 bytes
Database mounted.
Database altered.

至此恢复完成,再次sys是oracle内部默认的超级用户,系统很多调用在程序中写死的sys.,对其用户不能进行重命名操作.

coincidenceleague加密数据库恢复

联系：手机/微信(+86 17813235971) QQ(107644445)QQ咨询惜分飞

标题：coincidenceleague加密数据库恢复

作者：惜分飞©版权所有[未经本人同意,不得以任何形式转载,否则有进一步追究法律责任的权利.]

今天接到一个朋友的数据库被加密的请求
20200805003552

这种类型的加密,以前也遇到过很多次,而且能够实现效果较好的恢复,参考:mysql数据库被加密恢复,以前这类病毒一般主要就是对文件起始位置一些block进行破坏,这次对其分析发现和以前有了本质区别(采用间隔加密,每个文件分给为10段,每次加密7个block[8k])
20200805003525
不过这点破坏难不倒我们,通过底层恢复,绝大部分情况可以直接open数据库,如果运气不太好,也可以最大限度恢复数据
20200805005652
对于oracle数据文件被加密,在大部分情况下,我们可以通过底层恢复技术,实现数据库open,然后通过exp/expdp导出数据,实现恢复之后业务直接运行的效果,最大限度提高数据恢复效果和减少业务恢复的时间.

asm磁盘dd破坏恢复

联系：手机/微信(+86 17813235971) QQ(107644445)QQ咨询惜分飞

标题：asm磁盘dd破坏恢复

作者：惜分飞©版权所有[未经本人同意,不得以任何形式转载,否则有进一步追究法律责任的权利.]

有客户和我们反馈,由于运维人员操作错误,对一个磁盘组的asm disk进行了dd操作,导致部分数据丢失(客户数据文件存放在两个磁盘组中,其中一个被dd掉[误以为只是存放归档,其实由于第一个磁盘组空间不足,把部分数据文件放进该磁盘组])
20200603221148

通过对asm 日志进行分析发现被dd的磁盘是一个磁盘组,以前恢复过类似的asm 磁盘被dd的案例(asm磁盘头全部损坏数据0丢失恢复,上次因为dd破坏较少,所以可以通过修复磁盘组直接恢复出来里面数据,但是这次被dd了50M,直接修复磁盘头恢复数据基本上不太可能.通过工具对其进行磁盘扫描,参考:asm disk header 彻底损坏恢复,对扫描结果进行分析,发现不少数据块是重复,无法较好的实现重组效果.
20200612002025
类似出现这样的情况一般是由于该asm磁盘组中有同一个文件号的数据多份(比如一个磁盘组中有两个库,同一个数据文件存储多份),通过方面分析,该库没有文件多份存储而且该磁盘组中只有一个数据库.进一步分析仅有的asm alert日志(大部分日志被清除),发现类似信息

Sun Mar 14 05:25:40 CST 2020
NOTE: F1X0 found on disk 0 fcn 0.60289025
NOTE: cache opening disk 0 of grp 2: HIS_FLASH00 label:HIS_FLASH00
NOTE: cache opening disk 1 of grp 2: HIS_FLASH01 label:HIS_FLASH01
NOTE: cache opening disk 2 of grp 2: HIS_FLASH02 label:HIS_FLASH02
NOTE: cache opening disk 3 of grp 2: HIS_DATA03 label:HIS_DATA03
NOTE: cache mounting (first) group 2/0xCCD84BCB (HIS_FLASH)
* allocate domain 2, invalid = TRUE 
kjbdomatt send to node 0
Sun Mar 14 05:25:40 CST 2020
NOTE: attached to recovery domain 2
Sun Mar 14 05:25:40 CST 2020
NOTE: starting recovery of thread=1 ckpt=405.816 group=2
NOTE: advancing ckpt for thread=1 ckpt=405.819
NOTE: cache recovered group 2 to fcn 0.65493064
Sun Mar 14 05:25:40 CST 2020
NOTE: LGWR attempting to mount thread 1 for disk group 2
NOTE: LGWR mounted thread 1 for disk group 2
NOTE: opening chunk 1 at fcn 0.65493064 ABA 
NOTE: seq=406 blk=820 
Sun Mar 14 05:25:40 CST 2020
NOTE: cache mounting group 2/0xCCD84BCB (HIS_FLASH) succeeded
SUCCESS: diskgroup HIS_FLASH was mounted
Sun Mar 14 05:25:42 CST 2020
NOTE: recovering COD for group 2/0xccd84bcb (HIS_FLASH)
SUCCESS: completed COD recovery for group 2/0xccd84bcb (HIS_FLASH)
Sun Mar 14 05:25:47 CST 2020
Starting background process ASMB
ASMB started with pid=17, OS id=14599

初步可以定位,很可能是由于在3月份对该磁盘组进行了扩容,从而发生了数据文件的rebalance操作,从而出现了某些block有重复现象,对于这类情况,通过结合asm字典信息进行分析可以完全规避该问题,对数据文件进行恢复,dbv进行检查,一切正常
20200612000805

对所有文件类似处理,结合正常磁盘组中数据文件,对数据库进行直接open,实现完美恢复.
如果您遇到此类情况,无法解决请联系我们，提供专业ORACLE数据库恢复技术支持
Phone:17813235971    Q Q:107644445QQ咨询惜分飞    E-Mail:dba@xifenfei.com
这次数据能够完美恢复属于侥幸,因为asm disk被dd了50M(正常情况下4个磁盘的磁盘组每个磁盘dd 50M之后,很可能有部分数据文件被覆盖,该客户该磁盘组最初是存储归档日志,因此数据文件写入位置相对比较靠后,从而没有被dd破坏)

oracle asm中drop pdb恢复方法

联系：手机/微信(+86 17813235971) QQ(107644445)QQ咨询惜分飞

标题：oracle asm中drop pdb恢复方法

作者：惜分飞©版权所有[未经本人同意,不得以任何形式转载,否则有进一步追究法律责任的权利.]

最近分析研究了一种asm disk 数据文件丢失的新恢复方法,通过cod和acd进行恢复,我们对于asm 磁盘组中的文件的改变(创建,删除,扩大,缩小等)操作会体现在cod和acd中有一些体现,类似oracle 数据库中数据的变化都会体现在redo和undo中类似.可以通过对他们的分析,确认文件在asm磁盘组中的分配关系,从而实现数据文件的恢复.我这里通过模拟创建表空间,插入数据,删除表空间(同时也删除文件),然后相关cod和acd分析,实现数据文件恢复.
创建表空间

SQL> create tablespace xifenfei datafile '+data' size 1G;

Tablespace created.

SQL> alter tablespace xifenfei add datafile '+data' size 128M autoextend on;

Tablespace altered.

创建模拟表并插入数据

SQL> create table t_xifenfei tablespace xifenfei as
  2  select * from dba_objects;

Table created.

SQL> insert into t_xifenfei select * from t_xifenfei;

73013 rows created.

…………

SQL> insert into t_xifenfei select * from t_xifenfei;

18691328 rows created.

SQL> COMMIT;

Commit complete.

SQL> SELECT COUNT(1) FROM T_XIFENFEI;

  COUNT(1)
----------
  37382656

SQL> alter system checkpoint;

System altered.

SQL> select bytes/1024/1024/1024,TABLESPACE_NAME FROM USER_SEGMENTS  where segment_name='T_XIFENFEI';

BYTES/1024/1024/1024 TABLESPACE_NAME
-------------------- ------------------------------
          5.56738281 XIFENFEI

删除表空间

SQL> drop tablespace xifenfei including contents and datafiles;

Tablespace dropped.

查看alert日志信息

2020-04-23T18:23:43.088997-04:00
drop tablespace xifenfei including contents and datafiles
2020-04-23T18:23:46.226654-04:00
Deleted Oracle managed file +DATA/ORA18C/DATAFILE/xifenfei.262.1035571131
Deleted Oracle managed file +DATA/ORA18C/DATAFILE/xifenfei.263.1038507123
Completed: drop tablespace xifenfei including contents and datafiles

这里我们可以看到被删除的两个数据文件的asm number为262和263,如果要恢复该表空间数据需要先恢复出来该数据文件.由于文件被删除,文件对应存储在asm里面的找出来相关的数据分配关系才可以对其恢复出来.尝试找该文件的分配extent映射关系
尝试直接读取extent map

[root@rac18c2 ~]#  kfed read /dev/xifenfei-sdb  aus=4194304 blkn=0|grep f1b1locn
kfdhdb.f1b1locn:                     10 ; 0x0d4: 0x0000000a
[root@rac18c2 ~]#  kfed read /dev/xifenfei-sdb  aus=4194304 aun=10 blkn=262|more
kfbh.endian:                          1 ; 0x000: 0x01
kfbh.hard:                          130 ; 0x001: 0x82
kfbh.type:                            4 ; 0x002: KFBTYP_FILEDIR
kfbh.datfmt:                          1 ; 0x003: 0x01
kfbh.block.blk:                     262 ; 0x004: blk=262
kfbh.block.obj:                       1 ; 0x008: file=1
kfbh.check:                  4132734069 ; 0x00c: 0xf6548475
kfbh.fcn.base:                     6741 ; 0x010: 0x00001a55
kfbh.fcn.wrap:                        0 ; 0x014: 0x00000000
kfbh.spare1:                          0 ; 0x018: 0x00000000
kfbh.spare2:                          0 ; 0x01c: 0x00000000
kfffdb.node.incarn:          1035571132 ; 0x000: A=0 NUMM=0x1edcc7de
kfffdb.node.frlist.number:          264 ; 0x004: 0x00000108
kfffdb.node.frlist.incarn:            0 ; 0x008: A=0 NUMM=0x0
kfffdb.hibytes:                       0 ; 0x00c: 0x00000000
kfffdb.lobytes:              1073750016 ; 0x010: 0x40002000
kfffdb.xtntcnt:                       0 ; 0x014: 0x00000000
kfffdb.xtnteof:                     257 ; 0x018: 0x00000101
kfffdb.blkSize:                    8192 ; 0x01c: 0x00002000
kfffdb.flags:                         1 ; 0x020: O=1 S=0 S=0 D=0 C=0 I=0 R=0 A=0
kfffdb.fileType:                      2 ; 0x021: 0x02
…………
kfffdb.mxshad:                        0 ; 0x498: 0x0000
kfffdb.mxprnt:                        0 ; 0x49a: 0x0000
kfffdb.fmtBlks:                  131073 ; 0x49c: 0x00020001
kfffde[0].xptr.au:           4294967295 ; 0x4a0: 0xffffffff
kfffde[0].xptr.disk:              65535 ; 0x4a4: 0xffff
kfffde[0].xptr.flags:                 0 ; 0x4a6: L=0 E=0 D=0 S=0 R=0 I=0
kfffde[0].xptr.chk:                  42 ; 0x4a7: 0x2a
kfffde[1].xptr.au:           4294967295 ; 0x4a8: 0xffffffff
kfffde[1].xptr.disk:              65535 ; 0x4ac: 0xffff
kfffde[1].xptr.flags:                 0 ; 0x4ae: L=0 E=0 D=0 S=0 R=0 I=0
kfffde[1].xptr.chk:                  42 ; 0x4af: 0x2a

这里的kfffdb.blkSize为8192证明以前很可能是数据文件,但是kfffde中的au和disk全部被置为f,说明extent的直接映射表已经被置空,更不用说间接extent分配映射表,也就是说这条路无法走通.变换一种思路,既然文件从asm中删除掉的extent映射关系被清空,那是否可以通过对应的acd记录来找到相关数据.通过对acd进行分析,发现在删除drop的时间点相关类似记录,通过分析对应的acd记录,发现直接extent和扩展extent分配全部被置空,无法通过该思路进行恢复
尝试acd恢复extent map

kfracdb2.lge[2].bcd[2].kfbl.blk:    262 ; 0x1cc: blk=262
kfracdb2.lge[2].bcd[2].kfbl.obj:      1 ; 0x1d0: file=1
kfracdb2.lge[2].bcd[2].kfcn.base:  6216 ; 0x1d4: 0x00001848
kfracdb2.lge[2].bcd[2].kfcn.wrap:     0 ; 0x1d8: 0x00000000
kfracdb2.lge[2].bcd[2].oplen:        20 ; 0x1dc: 0x0014
kfracdb2.lge[2].bcd[2].blkIndex:    262 ; 0x1de: 0x0106
kfracdb2.lge[2].bcd[2].flags:        28 ; 0x1e0: F=0 N=0 F=1 L=1 V=1 A=0 C=0 R=0
kfracdb2.lge[2].bcd[2].opcode:      162 ; 0x1e2: 0x00a2
kfracdb2.lge[2].bcd[2].kfbtyp:        4 ; 0x1e4: KFBTYP_FILEDIR
kfracdb2.lge[2].bcd[2].redund:       17 ; 0x1e5: SCHE=0x1 NUMB=0x1
kfracdb2.lge[2].bcd[2].pad:       63903 ; 0x1e6: 0xf99f
kfracdb2.lge[2].bcd[2].KFFFD_PEXT.xtntcnt:0 ; 0x1e8: 0x00000000
kfracdb2.lge[2].bcd[2].KFFFD_PEXT.xtntblk:0 ; 0x1ec: 0x0000
kfracdb2.lge[2].bcd[2].KFFFD_PEXT.xnum:0 ; 0x1ee: 0x0000
kfracdb2.lge[2].bcd[2].KFFFD_PEXT.xcnt:1 ; 0x1f0: 0x0001
kfracdb2.lge[2].bcd[2].KFFFD_PEXT.setflg:0 ; 0x1f2: 0x00
kfracdb2.lge[2].bcd[2].KFFFD_PEXT.flags:0 ; 0x1f3: O=0 S=0 S=0 D=0 C=0 I=0 R=0 A=0
kfracdb2.lge[2].bcd[2].KFFFD_PEXT.xptr[0].au:4294967292 ; 0x1f4: 0xfffffffc
kfracdb2.lge[2].bcd[2].KFFFD_PEXT.xptr[0].disk:0 ; 0x1f8: 0x0000
kfracdb2.lge[2].bcd[2].KFFFD_PEXT.xptr[0].flags:0 ; 0x1fa: L=0 E=0 D=0 S=0 R=0 I=0
kfracdb2.lge[2].bcd[2].KFFFD_PEXT.xptr[0].chk:41 ; 0x1fb: 0x29
kfracdb2.lge[2].bcd[2].au[0]:        10 ; 0x1fc: 0x0000000a
kfracdb2.lge[2].bcd[2].disks[0]:      0 ; 0x200: 0x0000


kfracdb2.lge[20].bcd[1].kfbl.blk:2147483648 ; 0xe54: blk=0 (indirect)
kfracdb2.lge[20].bcd[1].kfbl.obj:   262 ; 0xe58: file=262
kfracdb2.lge[20].bcd[1].kfcn.base: 3280 ; 0xe5c: 0x00000cd0
kfracdb2.lge[20].bcd[1].kfcn.wrap:    0 ; 0xe60: 0x00000000
kfracdb2.lge[20].bcd[1].oplen:       16 ; 0xe64: 0x0010
kfracdb2.lge[20].bcd[1].blkIndex:     0 ; 0xe66: 0x0000
kfracdb2.lge[20].bcd[1].flags:       28 ; 0xe68: F=0 N=0 F=1 L=1 V=1 A=0 C=0 R=0
kfracdb2.lge[20].bcd[1].opcode:     163 ; 0xe6a: 0x00a3
kfracdb2.lge[20].bcd[1].kfbtyp:      12 ; 0xe6c: KFBTYP_INDIRECT
kfracdb2.lge[20].bcd[1].redund:      17 ; 0xe6d: SCHE=0x1 NUMB=0x1
kfracdb2.lge[20].bcd[1].pad:      63903 ; 0xe6e: 0xf99f
kfracdb2.lge[20].bcd[1].KFFIX_PEXT.xtntblk:0 ; 0xe70: 0x0000
kfracdb2.lge[20].bcd[1].KFFIX_PEXT.xnum:0 ; 0xe72: 0x0000
kfracdb2.lge[20].bcd[1].KFFIX_PEXT.xcnt:1 ; 0xe74: 0x0001
kfracdb2.lge[20].bcd[1].KFFIX_PEXT.ub2spare:0 ; 0xe76: 0x0000
kfracdb2.lge[20].bcd[1].KFFIX_PEXT.xptr[0].au:4294967292 ; 0xe78: 0xfffffffc
kfracdb2.lge[20].bcd[1].KFFIX_PEXT.xptr[0].disk:0 ; 0xe7c: 0x0000
kfracdb2.lge[20].bcd[1].KFFIX_PEXT.xptr[0].flags:0 ; 0xe7e: L=0 E=0 D=0 S=0 R=0 I=0
kfracdb2.lge[20].bcd[1].KFFIX_PEXT.xptr[0].chk:41 ; 0xe7f: 0x29
kfracdb2.lge[20].bcd[1].au[0]:      296 ; 0xe80: 0x00000128
kfracdb2.lge[20].bcd[1].disks[0]:     0 ; 0xe84: 0x0000

直接通过删除的acd记录来找出来数据文件分配的extent也行不通,通过分析相关acd block,终于找到了对应的extent分配的相关记录

kfracdb2.lge[21].bcd[0].kfbl.blk:     2 ; 0x918: blk=2
kfracdb2.lge[21].bcd[0].kfbl.obj:2147483648 ; 0x91c: disk=0
kfracdb2.lge[21].bcd[0].kfcn.base: 2820 ; 0x920: 0x00000b04
kfracdb2.lge[21].bcd[0].kfcn.wrap:    0 ; 0x924: 0x00000000
kfracdb2.lge[21].bcd[0].oplen:       28 ; 0x928: 0x001c
kfracdb2.lge[21].bcd[0].blkIndex:     2 ; 0x92a: 0x0002
kfracdb2.lge[21].bcd[0].flags:       28 ; 0x92c: F=0 N=0 F=1 L=1 V=1 A=0 C=0 R=0
kfracdb2.lge[21].bcd[0].opcode:      73 ; 0x92e: 0x0049
kfracdb2.lge[21].bcd[0].kfbtyp:       3 ; 0x930: KFBTYP_ALLOCTBL
kfracdb2.lge[21].bcd[0].redund:      18 ; 0x931: SCHE=0x1 NUMB=0x2
kfracdb2.lge[21].bcd[0].pad:      63903 ; 0x932: 0xf99f
kfracdb2.lge[21].bcd[0].KFDAT_ALLOC2.vaa.curidx:2416 ; 0x934: 0x0970
kfracdb2.lge[21].bcd[0].KFDAT_ALLOC2.vaa.nxtidx:8 ; 0x936: 0x0008
kfracdb2.lge[21].bcd[0].KFDAT_ALLOC2.vaa.prvidx:8 ; 0x938: 0x0008
kfracdb2.lge[21].bcd[0].KFDAT_ALLOC2.vaa.asz:0 ; 0x93a: KFDASZ_1X
kfracdb2.lge[21].bcd[0].KFDAT_ALLOC2.vaa.frag:0 ; 0x93b: 0x00
kfracdb2.lge[21].bcd[0].KFDAT_ALLOC2.vaa.total:0 ; 0x93c: 0x0000
kfracdb2.lge[21].bcd[0].KFDAT_ALLOC2.vaa.free:0 ; 0x93e: 0x0000
kfracdb2.lge[21].bcd[0].KFDAT_ALLOC2.vaa.fnum:262 ; 0x940: 0x00000106
kfracdb2.lge[21].bcd[0].KFDAT_ALLOC2.vaa.xnum:0 ; 0x944: 0x00000000
kfracdb2.lge[21].bcd[0].KFDAT_ALLOC2.vaa.flags:8388608 ; 0x948: 0x00800000
kfracdb2.lge[21].bcd[0].KFDAT_ALLOC2.lxnum:3 ; 0x94c: 0x03
kfracdb2.lge[21].bcd[0].KFDAT_ALLOC2.spare1:0 ; 0x94d: 0x00
kfracdb2.lge[21].bcd[0].KFDAT_ALLOC2.spare2:0 ; 0x94e: 0x0000
kfracdb2.lge[21].bcd[0].au[0]:        0 ; 0x950: 0x00000000
kfracdb2.lge[21].bcd[0].au[1]:       11 ; 0x954: 0x0000000b
kfracdb2.lge[21].bcd[0].disks[0]:     0 ; 0x958: 0x0000
kfracdb2.lge[21].bcd[0].disks[1]:     0 ; 0x95a: 0x0000
kfracdb2.lge[21].bcd[1].kfbl.blk:   262 ; 0x95c: blk=262
kfracdb2.lge[21].bcd[1].kfbl.obj:     1 ; 0x960: file=1
kfracdb2.lge[21].bcd[1].kfcn.base: 3018 ; 0x964: 0x00000bca
kfracdb2.lge[21].bcd[1].kfcn.wrap:    0 ; 0x968: 0x00000000
kfracdb2.lge[21].bcd[1].oplen:       20 ; 0x96c: 0x0014
kfracdb2.lge[21].bcd[1].blkIndex:   262 ; 0x96e: 0x0106
kfracdb2.lge[21].bcd[1].flags:       28 ; 0x970: F=0 N=0 F=1 L=1 V=1 A=0 C=0 R=0
kfracdb2.lge[21].bcd[1].opcode:     162 ; 0x972: 0x00a2
kfracdb2.lge[21].bcd[1].kfbtyp:       4 ; 0x974: KFBTYP_FILEDIR
kfracdb2.lge[21].bcd[1].redund:      17 ; 0x975: SCHE=0x1 NUMB=0x1
kfracdb2.lge[21].bcd[1].pad:      63903 ; 0x976: 0xf99f
kfracdb2.lge[21].bcd[1].KFFFD_PEXT.xtntcnt:0 ; 0x978: 0x00000000
kfracdb2.lge[21].bcd[1].KFFFD_PEXT.xtntblk:0 ; 0x97c: 0x0000
kfracdb2.lge[21].bcd[1].KFFFD_PEXT.xnum:0 ; 0x97e: 0x0000
kfracdb2.lge[21].bcd[1].KFFFD_PEXT.xcnt:1 ; 0x980: 0x0001
kfracdb2.lge[21].bcd[1].KFFFD_PEXT.setflg:0 ; 0x982: 0x00
kfracdb2.lge[21].bcd[1].KFFFD_PEXT.flags:0 ; 0x983: O=0 S=0 S=0 D=0 C=0 I=0 R=0 A=0
kfracdb2.lge[21].bcd[1].KFFFD_PEXT.xptr[0].au:297 ; 0x984: 0x00000129
kfracdb2.lge[21].bcd[1].KFFFD_PEXT.xptr[0].disk:0 ; 0x988: 0x0000
kfracdb2.lge[21].bcd[1].KFFFD_PEXT.xptr[0].flags:0 ; 0x98a: L=0 E=0 D=0 S=0 R=0 I=0
kfracdb2.lge[21].bcd[1].KFFFD_PEXT.xptr[0].chk:2 ; 0x98b: 0x02
kfracdb2.lge[21].bcd[1].au[0]:       10 ; 0x98c: 0x0000000a
kfracdb2.lge[21].bcd[1].disks[0]:     0 ; 0x990: 0x0000
kfracdb2.lge[21].bcd[2].kfbl.blk:     2 ; 0x994: blk=2
kfracdb2.lge[21].bcd[2].kfbl.obj:     4 ; 0x998: file=4
kfracdb2.lge[21].bcd[2].kfcn.base: 3019 ; 0x99c: 0x00000bcb
kfracdb2.lge[21].bcd[2].kfcn.wrap:    0 ; 0x9a0: 0x00000000
kfracdb2.lge[21].bcd[2].oplen:        8 ; 0x9a4: 0x0008
kfracdb2.lge[21].bcd[2].blkIndex:     2 ; 0x9a6: 0x0002
kfracdb2.lge[21].bcd[2].flags:       28 ; 0x9a8: F=0 N=0 F=1 L=1 V=1 A=0 C=0 R=0
kfracdb2.lge[21].bcd[2].opcode:     211 ; 0x9aa: 0x00d3
kfracdb2.lge[21].bcd[2].kfbtyp:      16 ; 0x9ac: KFBTYP_COD_DATA
kfracdb2.lge[21].bcd[2].redund:      17 ; 0x9ad: SCHE=0x1 NUMB=0x1
kfracdb2.lge[21].bcd[2].pad:      63903 ; 0x9ae: 0xf99f
kfracdb2.lge[21].bcd[2].KFRCOD_DATA.offset:60 ; 0x9b0: 0x003c
kfracdb2.lge[21].bcd[2].KFRCOD_DATA.length:4 ; 0x9b2: 0x0004
kfracdb2.lge[21].bcd[2].KFRCOD_DATA.data[0]:1 ; 0x9b4: 0x01
kfracdb2.lge[21].bcd[2].KFRCOD_DATA.data[1]:0 ; 0x9b5: 0x00
kfracdb2.lge[21].bcd[2].KFRCOD_DATA.data[2]:0 ; 0x9b6: 0x00
kfracdb2.lge[21].bcd[2].KFRCOD_DATA.data[3]:0 ; 0x9b7: 0x00
kfracdb2.lge[21].bcd[2].au[0]:       16 ; 0x9b8: 0x00000010
kfracdb2.lge[21].bcd[2].disks[0]:     0 ; 0x9bc: 0x0000

对于类似这样的记录,通过汇总处理获得所有的file number对应的au extent分配记录,并且生成dd语句,然后生成文件
20200428213654

dbv检查恢复文件

[oracle@rac18c2 tmp]$ dbv file=262.dbf

DBVERIFY: Release 18.0.0.0.0 - Production on Tue Apr 28 09:45:37 2020

Copyright (c) 1982, 2018, Oracle and/or its affiliates.  All rights reserved.

DBVERIFY - Verification starting : FILE = /tmp/262.dbf


DBVERIFY - Verification complete

Total Pages Examined         : 131072
Total Pages Processed (Data) : 123400
Total Pages Failing   (Data) : 0
Total Pages Processed (Index): 0
Total Pages Failing   (Index): 0
Total Pages Processed (Other): 631
Total Pages Processed (Seg)  : 0
Total Pages Failing   (Seg)  : 0
Total Pages Empty            : 7041
Total Pages Marked Corrupt   : 0
Total Pages Influx           : 0
Total Pages Encrypted        : 0
Highest block SCN            : 10001146011 (2.1411211419)

[oracle@rac18c2 tmp]$ dbv file=263.dbf

DBVERIFY: Release 18.0.0.0.0 - Production on Tue Apr 28 09:51:05 2020

Copyright (c) 1982, 2018, Oracle and/or its affiliates.  All rights reserved.

DBVERIFY - Verification starting : FILE = /tmp/263.dbf



DBVERIFY - Verification complete

Total Pages Examined         : 643584
Total Pages Processed (Data) : 595146
Total Pages Failing   (Data) : 0
Total Pages Processed (Index): 0
Total Pages Failing   (Index): 0
Total Pages Processed (Other): 821
Total Pages Processed (Seg)  : 0
Total Pages Failing   (Seg)  : 0
Total Pages Empty            : 36865
Total Pages Marked Corrupt   : 0
Total Pages Influx           : 0
Total Pages Encrypted        : 0
Highest block SCN            : 10001153042 (2.1411218450)
[oracle@rac18c2 tmp]$

dul确认恢复文件中数据

DUL>  scan database
start scan database in parallel 1...
scan database completed.
DUL>  sample all segment 
start get segment info: data_obj#: 74635
finish get segment info: data_obj#: 74635
guess col def: 22
write segment info: 74635, 1, 8, 22
write sample rows: 10000
DUL>  unload 74635
 2020-04-24 22:32:11 unloading table segment 74635...
 2020-04-24 22:35:36 unloaded 37382656 rows.
DUL>

通过dbv和实际数据条数对比,此种恢复恢复的数据完全正常,不用使用底层碎片扫描,亦可恢复asm中被删除数据文件数据.在某些特殊情况下,此类方法配合底层碎片恢复,可以实现更加完美的恢复效果.对于比较典型的oracle pdb被删除(因为有多个数据文件的文件号是一样的,无法直接通过底层碎片扫描恢复),通过此类方法可以非常好的恢复出来.
类似文章参考:
asm disk header 彻底损坏恢复
ASM未正常启动,使用dd找回数据文件
asm磁盘组操作不当导致数据文件丢失恢复
如果你不幸遭遇asm 数据文件被删除/丢失,或者误删除pdb等相关事宜,如果需要恢复可以联系我们,提供专业数据库恢复服务
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