文件read only导致数据库无法open

发表于 2017 年 12 月 14 日 由 惜分飞

在一次客户的恢复请求中,系统被黑客入侵,数据库无法启动.虽然system文件可以拷贝,但是无论拷贝到哪里,都无法dbv和open数据库,报O/S-Error: (OS 5)和DBV-00600错误.最后检查发现是文件设置了只读
数据库启动报错

ORACLE 例程已经启动。

Total System Global Area 6881345536 bytes
Fixed Size                  2130160 bytes
Variable Size            4026535696 bytes
Database Buffers         2818572288 bytes
Redo Buffers               34107392 bytes
数据库装载完毕。
ORA-01113: 文件 1 需要介质恢复
ORA-01110: 数据文件 1: 'D:\APP\ADMINISTRATOR\ORADATA\xifenfei\SYSTEM01.DBF'


SQL> recover datafile 1;
ORA-00283: 恢复会话因错误而取消
ORA-01114: 将块写入文件 1 时出现 IO 错误 (块 # 1)
ORA-01110: 数据文件 1: 'D:\APP\ADMINISTRATOR\ORADATA\xifenfei\SYSTEM01.DBF'
ORA-27091: 无法将 I/O 排队
ORA-27041: 无法打开文件
OSD-04002: 无法打开文件
O/S-Error: (OS 5) 拒绝访问。

SQL> recover database until cancel using backup controlfile;
ORA-00283: 恢复会话因错误而取消
ORA-01201: 文件 1 标头无法正确写入

alert日志报错

Completed: ALTER DATABASE   MOUNT
Sun Dec 10 12:03:20 2017
alter database open
Errors in file d:\app\administrator\diag\rdbms\xifenfei\xifenfei\trace\xifenfei_ora_6860.trc:
ORA-01110: 数据文件 1: 'D:\APP\ADMINISTRATOR\ORADATA\xifenfei\SYSTEM01.DBF'
ORA-01114: 将块写入文件 1 时出现 IO 错误 (块 # 1)
ORA-27041: 无法打开文件
OSD-04002: 无法打开文件
O/S-Error: (OS 5) 拒绝访问。
ORA-01201: 文件 1 标头无法正确写入
ORA-1113 signalled during: alter database open...
Sun Dec 10 12:03:33 2017
ALTER DATABASE RECOVER  datafile 1  
Media Recovery Start
Fast Parallel Media Recovery NOT enabled
Media Recovery failed with error 1114
ORA-283 signalled during: ALTER DATABASE RECOVER  datafile 1  ...

dbv检查文件

D:\APP\ADMINISTRATOR\ORADATA>dbv file=system01.dbf

DBVERIFY: Release 11.1.0.7.0 - Production on 星期日 12月 10 19:06:55 2017

Copyright (c) 1982, 2007, Oracle.  All rights reserved.


DBV-00600: 致命错误 - [22] [27041] [0] [0]

win-readonly

这里很明显,文件不能写操作的原因,就是由于该属性导致

发表在 Oracle备份恢复 | 标签为 , , , , | 评论关闭

redhat和oracle linux kernel对应关系

发表于 2017 年 12 月 4 日 由 惜分飞

Red Hat Enterprise Linux Version / Update

Red Hat Enterprise Linux – Kernel version / redhat-release string

Oracle Linux – Kernel version / release strings

 Red Hat Enterprise Linux 7

 Red Hat Enterprise Linux 7 Update 6

 3.10.0-957.el7.x86_64
redhat-release: Red Hat Enterprise Linux Server release 7.6 (Maipo)

 4.14.35-1818.3.3.el7uek.x86_64 ^ * (x86_64 only)
3.10.0-957.el7.x86_64 ^ (x86_64 only)
redhat-release: Red Hat Enterprise Linux Server release 7.6 (Maipo)
system-release: Oracle Linux Server release 7.6
oracle-release: Oracle Linux Server release 7.6

 Red Hat Enterprise Linux 7 Update 5

 3.10.0-862.el7.x86_64
redhat-release: Red Hat Enterprise Linux Server release 7.5 (Maipo)

 4.1.12-112.16.4.el7uek ^ * (x86_64 only)
3.10.0-862.el7.x86_64 ^ (x86_64 only)
redhat-release: Red Hat Enterprise Linux Server release 7.5 (Maipo)
system-release: Oracle Linux Server release 7.5
oracle-release: Oracle Linux Server release 7.5

 Red Hat Enterprise Linux 7 Update 4

 3.10.0-693.el7.x86_64
redhat-release: Red Hat Enterprise Linux Server release 7.4 (Maipo)

 4.1.12-94.3.9.el7uek ^ * (x86_64 only)
3.10.0-693.el7.x86_64 ^ (x86_64 only)
redhat-release: Red Hat Enterprise Linux Server release 7.4 (Maipo)
system-release: Oracle Linux Server release 7.4
oracle-release: Oracle Linux Server release 7.4

 Red Hat Enterprise Linux 7 Update 3

 3.10.0-514.el7.x86_64
redhat-release: Red Hat Enterprise Linux Server release 7.3 (Maipo)

 4.1.12-61.1.18.el7uek ^ * (x86_64 only)
3.10.0-514.el7.x86_64 ^ (x86_64 only)
redhat-release: Red Hat Enterprise Linux Server release 7.3 (Maipo)
system-release: Oracle Linux Server release 7.3
oracle-release: Oracle Linux Server release 7.3

 Red Hat Enterprise Linux 7 Update 2

 3.10.0-327.el7.x86_64
redhat-release: Red Hat Enterprise Linux Server release 7.2 (Maipo)

 3.8.13-98.6.1.el7uek ^ * (x86_64 only)
3.10.0-327.el7.x86_64 ^ (x86_64 only)
redhat-release: Red Hat Enterprise Linux Server release 7.2 (Maipo)
system-release: Oracle Linux Server release 7.2
oracle-release: Oracle Linux Server release 7.2

 Red Hat Enterprise Linux 7 Update 1

 3.10.0-229.el7.x86_64
redhat-release: Red Hat Enterprise Linux Server release 7.1 (Maipo)

 3.8.13-55.1.6.el7uek ^ * (x86_64 only)
3.10.0-229.el7.x86_64 ^ (x86_64 only)
redhat-release:Red Hat Enterprise Linux Server release 7.1 (Maipo)
system-release:Oracle Linux Server release 7.1
oracle-release: Oracle Linux Server release 7.1

 Red Hat Enterprise Linux 7 GA

 3.10.0-123.el7.x86_64
redhat-release: Red Hat Enterprise Linux Server release 7.0 (Maipo)

 3.8.13-35.3.1.el7uek ^ * (x86_64 only)
3.10.0-123.el7.x86_64 ^ (x86_64 only)
redhat-release:Red Hat Enterprise Linux Server release 7.0 (Maipo)
system-release:Oracle Linux Server release 7.0
oracle-release: Oracle Linux Server release 7.0

 Red Hat Enterprise Linux 6

 Red Hat Enterprise Linux Server 6 Update 10

 2.6.32-754.el6
 redhat-release: Red Hat Enterprise Linux Server release 6.10 (Santiago)

 4.1.12-124.16.4.el6uek ^ * (x86_64 only)
2.6.39-400.299.3.el6uek ^ * (x86 only)
2.6.32-754.el6 ^ (x86, x86_64)
redhat-release: Red Hat Enterprise Linux Server release 6.10 (Santiago)
system-release: Oracle Linux Server release 6.10
oracle-release: Oracle Linux Server release 6.10

 Red Hat Enterprise Linux Server 6 Update 9

 2.6.32-696.el6
redhat-release: Red Hat Enterprise Linux Server release 6.9 (Santiago)

 4.1.12-61.1.28.el6uek ^ * (x86_64 only)
2.6.39-400.294.3.el6uek ^ * (x86 only)
2.6.32-696.el6 ^ (x86, x86_64)
redhat-release: Red Hat Enterprise Linux Server release 6.9 (Santiago)
system-release: Oracle Linux Server release 6.9
oracle-release: Oracle Linux Server release 6.9

 Red Hat Enterprise Linux Server 6 Update 8

 2.6.32-642.el6
redhat-release: Red Hat Enterprise Linux Server release 6.8 (Santiago)

 4.1.12-37.3.1.el6uek ^ * (x86_64 only)
2.6.39-400.278.2.el6uek ^ * (x86 only)
2.6.32-642.el6 ^ (x86, x86_64)
redhat-release: Red Hat Enterprise Linux Server release 6.8 (Santiago)
system-release: Oracle Linux Server release 6.8
oracle-release: Oracle Linux Server release 6.8

 Red Hat Enterprise Linux Server 6 Update 7

 2.6.32-573.el6
redhat-release: Red Hat Enterprise Linux Server release 6.7 (Santiago)

 3.8.13-68.3.4.el6uek ^ * (x86_64 only)
2.6.39-400.250.7.el6uek ^ * (x86 only)
2.6.32-573.el6 ^ (x86, x86_64)
redhat-release: Red Hat Enterprise Linux Server release 6.7 (Santiago)
system-release: Oracle Linux Server release 6.7
oracle-release: Oracle Linux Server release 6.7

 Red Hat Enterprise Linux Server 6 Update 6

 2.6.32-504.el6
redhat-release: Red Hat Enterprise Linux Server release 6.6 (Santiago)

 3.8.13-44.1.1.el6uek ^ * (x86_64 only)
2.6.39-400.215.10.el6uek ^ * (x86 only)
2.6.32-504.el6 ^ (x86, x86_64)
redhat-release: Red Hat Enterprise Linux Server release 6.6 (Santiago)
system-release: Oracle Linux Server release 6.6
oracle-release: Oracle Linux Server release 6.6

 Red Hat Enterprise Linux Server 6 Update 5

 2.6.32-431.el6
redhat-release: Red Hat Enterprise Linux Server release 6.5 (Santiago)

 3.8.13-16.121.el6uek ^ * (x86_64 only)
2.6.39-400.211.1.el6uek ^ * (x86 only)
2.6.32-431.el6 ^ (x86, x86_64)
redhat-release: Red Hat Enterprise Linux Server release 6.5 (Santiago)
system-release: Oracle Linux Server release 6.5
oracle-release: Oracle Linux Server release 6.5

 Red Hat Enterprise Linux Server 6 Update 4

 2.6.32-358.el6
redhat-release: Red Hat Enterprise Linux Server release 6.4 (Santiago)

 2.6.39-400.17.1.el6uek ^ *
2.6.32-358.el6 ^
redhat-release: Red Hat Enterprise Linux Server release 6.4 (Santiago)
system-release: Oracle Linux Server release 6.4
oracle-release: Oracle Linux Server release 6.4

 Red Hat Enterprise Linux Server 6 Update 3

 2.6.32-279.el6
redhat-release: Red Hat Enterprise Linux Server release 6.3 (Santiago)

 2.6.39-200.24.1.el6uek ^ *
2.6.32-279.el6 ^
redhat-release: Red Hat Enterprise Linux Server release 6.3 (Santiago)
system-release: Oracle Linux Server release 6.3
oracle-release: Oracle Linux Server release 6.3

 Red Hat Enterprise Linux Server 6 Update 2

 2.6.32-220.el6
redhat-release: Red Hat Enterprise Linux Server release 6.2 (Santiago)

 2.6.32-100.34.1.el6uek ^ *
2.6.32-220.el6 ^
redhat-release: Red Hat Enterprise Linux Server release 6.2 (Santiago)
system-release: Oracle Linux Server release 6.2
oracle-release: Oracle Linux Server release 6.2

 Red Hat Enterprise Linux Server 6 Update 1

 2.6.32-131.el6
redhat-release: Red Hat Enterprise Linux Server release 6.1 (Santiago)

 2.6.32-100.34.1.el6uek ^ *
2.6.32-131.0.15.el6 ^
redhat-release: Red Hat Enterprise Linux Server release 6.1 (Santiago)
system-release: Oracle Linux Server release 6.1
oracle-release: Oracle Linux Server release 6.1

 Red Hat Enterprise Linux Server 6 GA

 2.6.32-71.el6
redhat-release: Red Hat Enterprise Linux Server release 6.0 (Santiago)

 2.6.32-100.28.5.el6uek ^ *
2.6.32-71.el6 ^
redhat-release: Red Hat Enterprise Linux Server release 6.0 (Santiago)
system-release: Oracle Linux Server release 6.0
oracle-release: Oracle Linux Server release 6.0

 Red Hat Enterprise Linux 5

 Red Hat Enterprise Linux Server 5 Update 11

 2.6.18-398.el5
redhat-release: Red Hat Enterprise Linux Server release 5.11 (Tikanga)

 2.6.39-400.215.10.el5uek ^ * (x86, x86_64)
2.6.18-398.el5 ^ (x86, x86_64)
2.6.18-398.0.0.0.1.el5 (x86, x86_64)
redhat-release: Red Hat Enterprise Linux Server release 5.11 (Tikanga)
enterprise-release: Enterprise Linux Enterprise Linux Server release 5.11 (Carthage)
oracle-release: Oracle Linux Server release 5.11

 Red Hat Enterprise Linux Server 5 Update 10

 2.6.18-371.el5
redhat-release: Red Hat Enterprise Linux Server release 5.10 (Tikanga)

 2.6.39-400.209.1.el5uek ^ * (x86, x86_64)
2.6.18-371.el5 ^ (x86, x86_64)
2.6.18-371.0.0.0.1.el5 (x86, x86_64)
redhat-release: Red Hat Enterprise Linux Server release 5.10 (Tikanga)
enterprise-release: Enterprise Linux Enterprise Linux Server release 5.10 (Carthage)
oracle-release: Oracle Linux Server release 5.10

 Red Hat Enterprise Linux Server 5 Update 9

 2.6.18-348.el5
redhat-release: Red Hat Enterprise Linux Server release 5.9 (Tikanga)

 2.6.39-300.26.1.el5uek ^ * (x86, x86_64)
2.6.18-348.el5 ^ (x86, x86_64)
2.6.18-348.0.0.0.1.el5 (x86, x86_64)
redhat-release: Red Hat Enterprise Linux Server release 5.9 (Tikanga)
enterprise-release: Enterprise Linux Enterprise Linux Server release 5.9 (Carthage)
oracle-release: Oracle Linux Server release 5.9

 Red Hat Enterprise Linux Server 5 Update 8

 2.6.18-308.el5
redhat-release: Red Hat Enterprise Linux Server release 5.8 (Tikanga)

 2.6.32-300.10.1.el5uek ^ * (x86, x86_64)
2.6.18-308.el5 ^ (x86, x86_64)
2.6.18-308.0.0.0.1.el5 (x86, x86_64)
redhat-release: Red Hat Enterprise Linux Server release 5.8 (Tikanga)
enterprise-release: Enterprise Linux Enterprise Linux Server release 5.8 (Carthage)
oracle-release: Oracle Linux Server release 5.8

 Red Hat Enterprise Linux Server 5 Update 7

 2.6.18-274.el5
redhat-release: Red Hat Enterprise Linux Server release 5.7 (Tikanga)

 2.6.32-200.13.1.el5uek ^ * (x86, x86_64)
2.6.18-274.el5 ^ (x86, x86_64)
2.6.18-274.0.0.0.1.el5 (x86, x86_64)
redhat-release: Red Hat Enterprise Linux Server release 5.7 (Tikanga)
enterprise-release: Enterprise Linux Enterprise Linux Server release 5.7 (Carthage)
oracle-release: Oracle Linux Server release 5.7

 Red Hat Enterprise Linux Server 5 Update 6

 2.6.18-238.el5
redhat-release: Red Hat Enterprise Linux Server release 5.6 (Tikanga)

 2.6.32-100.26.2.el5uek ^ * (x86_64 only)
2.6.18-238.el5 ^ (x86, x86_64)
2.6.18-238.0.0.0.1.el5 (x86, x86_64)
redhat-release: Red Hat Enterprise Linux Server release 5.6 (Tikanga)
enterprise-release: Enterprise Linux Enterprise Linux Server release 5.6 (Carthage)
oracle-release: Oracle Linux Server release 5.6

 Red Hat Enterprise Linux Server 5 Update 5

 2.6.18-194.el5
redhat-release: Red Hat Enterprise Linux Server release 5.5 (Tikanga)

 2.6.18-194.el5 ^ * (x86, x86_64, ia64)
2.6.32-100.24.1.el5 # (x86_64 only)
2.6.18-194.0.0.0.3.el5 (x86, x86_64, ia64)
redhat-release: Red Hat Enterprise Linux Server release 5.5 (Tikanga)
enterprise-release: Enterprise Linux Enterprise Linux Server release 5.5 (Carthage)
oracle-release: Oracle Linux Server release 5.5

 Red Hat Enterprise Linux Server 5 Update 4

 2.6.18-164.el5
redhat-release: Red Hat Enterprise Linux Server release 5.4 (Tikanga)

 2.6.18-164.el5 ^ * (x86, x86_64, ia64)
2.6.18-164.0.0.0.1.el5 (x86, x86_64, ia64)
UEK unavailable
redhat-release: Red Hat Enterprise Linux Server release 5.4 (Tikanga)
enterprise-release: Enterprise Linux Enterprise Linux Server release 5.4 (Carthage)

 Red Hat Enterprise Linux Server 5 Update 3

 2.6.18-128.el5
redhat-release: Red Hat Enterprise Linux Server release 5.3 (Tikanga)

 2.6.18-128.el5 ^ * (x86, x86_64, ia64)
2.6.18-128.0.0.0.2.el5 (x86, x86_64, ia64)
UEK unavailable
redhat-release: Red Hat Enterprise Linux Server release 5.3 (Tikanga)
enterprise-release: Enterprise Linux Enterprise Linux Server release 5.3 (Carthage)

 Red Hat Enterprise Linux Server 5 Update 2

 2.6.18-92.el5
redhat-release: Red Hat Enterprise Linux Server release 5.2 (Tikanga)

 2.6.18-92.el5 ^ * (x86, x86_64, ia64)
2.6.18-92.0.0.0.1.el5 (x86, x86_64, ia64)
UEK unavailable
redhat-release: Enterprise Linux Enterprise Linux Server release 5.2 (Carthage)
enterprise-release: Enterprise Linux Enterprise Linux Server release 5.2 (Carthage)

 Red Hat Enterprise Linux Server 5 Update 1

 2.6.18-53.el5
redhat-release: Red Hat Enterprise Linux Server release 5.1 (Tikanga)

 2.6.18-53.el5 ^ * (x86, x86_64, ia64)
2.6.18-53.0.0.0.1.el5 (x86, x86_64, ia64)
UEK unavailable
redhat-release: Enterprise Linux Enterprise Linux Server release 5.1 (Carthage)
enterprise-release: Enterprise Linux Enterprise Linux Server release 5.1 (Carthage)

 Red Hat Enterprise Linux Server 5 GA

 2.6.18-8.el5
redhat-release: Red Hat Enterprise Linux Server release 5 (Tikanga)

 2.6.18-8.el5 ^ * (x86, x86_64, ia64)
2.6.18-8.0.0.4.1.el5 (x86, x86_64, ia64)
UEK unavailable
redhat-release: Enterprise Linux Enterprise Linux Server release 5 (Carthage)
enterprise-release: Enterprise Linux Enterprise Linux Server release 5 (Carthage)

 Red Hat Enterprise Linux 4

 Red Hat Enterprise Linux 4 Update 9

 2.6.9-100.EL
redhat-release: Red Hat Enterprise Linux AS release 4 (Nahant Update 9)

 2.6.9-100.0.0.0.1.EL ^ * (x86, x86_64, ia64)
 2.6.9-100.EL (x86, x86_64, ia64)
 UEK unavailable
 redhat-release: Red Hat Enterprise Linux AS release 4 (Nahant Update 9)
 enterprise-release: Enterprise Linux Enterprise Linux AS release 4 (October Update 9)

 Red Hat Enterprise Linux 4 Update 8

 2.6.9-89.EL
redhat-release: Red Hat Enterprise Linux AS release 4 (Nahant Update 8)

 2.6.9-89.0.0.0.1.EL ^ * (x86, x86_64, ia64)
2.6.9-89.EL (x86, x86_64, ia64)
UEK unavailable
redhat-release: Red Hat Enterprise Linux AS release 4 (Nahant Update 8)
enterprise-release: Enterprise Linux Enterprise Linux AS release 4 (October Update 8)

 Red Hat Enterprise Linux 4 Update 7

 2.6.9-78.EL
redhat-release: Red Hat Enterprise Linux AS release 4 (Nahant Update 7)

 2.6.9-78.0.0.0.1.EL ^ * (x86, x86_64, ia64)
2.6.9-78.EL (x86, x86_64, ia64)
UEK unavailable
redhat-release: Enterprise Linux Enterprise Linux AS release 4 (October Update 7)
enterprise-release: Enterprise Linux Enterprise Linux AS release 4 (October Update 7)

 Red Hat Enterprise Linux 4 Update 6

 2.6.9-67.EL
redhat-release: Red Hat Enterprise Linux AS release 4 (Nahant Update 6)

 2.6.9-67.0.0.0.1.EL ^ * (x86, x86_64, ia64)
2.6.9-67.EL ^ * (x86, x86_64, ia64)
UEK unavailable
redhat-release: Enterprise Linux Enterprise Linux AS release 4 (October Update 6)
enterprise-release: Enterprise Linux Enterprise Linux AS release 4 (October Update 6)

 Red Hat Enterprise Linux 4 Update 5

 2.6.9-55.EL
redhat-release: Red Hat Enterprise Linux AS release 4 (Nahant Update 5)

 2.6.9-55.0.0.0.2.EL ^ * (x86, x86_64)
2.6.9-55.EL (x86, x86_64)
UEK unavailable
redhat-release: Enterprise Linux Enterprise Linux AS release 4 (October Update 5)
enterprise-release: Enterprise Linux Enterprise Linux AS release 4 (October Update 5)

 Red Hat Enterprise Linux 4 Update 4

 2.6.9-42.EL
redhat-release: Red Hat Enterprise Linux AS release 4 (Nahant Update 4

 2.6.9-42.0.0.0.1.EL ^ * (x86, x86_64)
2.6.9-42.EL (x86, x86_64)
UEK unavailable
redhat-release: Enterprise Linux Enterprise Linux AS release 4 (October Update 4)
enterprise-release: Enterprise Linux Enterprise Linux AS release 4 (October Update 4)

 Red Hat Enterprise Linux 4 Update 3

 2.6.9-34.EL
redhat-release: Red Hat Enterprise Linux AS release 4 (Nahant Update 3)

No corresponding version

 Red Hat Enterprise Linux 4 Update 2

 2.6.9-22.EL
redhat-release: Red Hat Enterprise Linux AS release 4 (Nahant Update 2)

No corresponding version

 Red Hat Enterprise Linux 4 Update 1

 2.6.9-11.EL
redhat-release: Red Hat Enterprise Linux AS release 4 (Nahant Update 1)

No corresponding version

 Red Hat Enterprise Linux 4 GA

 2.6.9-5.EL
redhat-release: Red Hat Enterprise Linux AS release 4 (Nahant)

No corresponding version

参考：Comparison of Red Hat and Oracle Linux kernel versions and release strings (文档 ID 560992.1)

发表在 Linux | 标签为 , , | 评论关闭

asm磁盘组操作不当导致数据文件丢失恢复

发表于 2017 年 11 月 28 日 由 惜分飞

最近遇到数据库恢复case,客户是要更换存储,在数据库mount状态把使用omf方式存储数据的asm 磁盘组通过rman copy到新的通过别名方式存储的新的asm 磁盘组的存储中,但是由于操作人员粗心,copy语句中部分目标磁盘组的数据文件别名重复了,最后执行rename file之后,导致部分数据文件彻底丢失.我们通过底层碎片扫描(参考:asm disk header 彻底损坏恢复)对于该用户的数据实现完全恢复.
因为整个过程重现比较麻烦,这里测试从一个data磁盘组中有一个omf方式存储的含有两个数据文件的表空间,通过rman copy 把这个表空间的两个文件拷贝到datanew磁盘组中,但是由于粗心把两个数据文件的别名写成一样,结果导致该表空间的一个数据文件彻底丢失的测试.

创建测试表空间
在datanew磁盘组中创建omf方式管理的xifenfei表空间,含有两个数据文件,file#分别为14和15

SQL> create tablespace xifenfei datafile '+DATA' SIZE 128m;

Tablespace created.

SQL> ALTER TABLESPACE XIFENFEI ADD DATAFILE '+DATA' SIZE 128m AUTOEXTEND ON;

Tablespace altered.

SQL> SELECT FILE_NAME,FILE_ID FROM  DBA_DATA_FILES WHERE TABLESPACE_NAME='XIFENFEI';

FILE_NAME
--------------------------------------------------------------------------------
   FILE_ID
----------
+DATA/XFF/DATAFILE/xifenfei.276.961143809
        14

+DATA/XFF/DATAFILE/xifenfei.277.961143825
        15

rman copy datafile 14
通过rman copy把datafile 14拷贝到data磁盘组中,目标端为别名方式存储

RMAN> copy datafile 14 to '+datanew/xifenfei.dbf';

Starting backup at 27-NOV-17
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=24 device type=DISK
channel ORA_DISK_1: starting datafile copy
input datafile file number=00014 name=+DATA/XFF/DATAFILE/xifenfei.276.961143809
output file name=+DATANEW/xifenfei.dbf tag=TAG20171127T082643 RECID=4 STAMP=961144006
channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:07
Finished backup at 27-NOV-17


[grid@localhost ~]$ asmcmd
ASMCMD> cd datanew
ASMCMD> ls
XFF/
xifenfei.dbf
ASMCMD> ls -l
Type      Redund  Striped  Time             Sys  Name
                                            Y    XFF/
DATAFILE  UNPROT  COARSE   NOV 27 08:00:00  N    xifenfei.dbf => +DATANEW/XFF/DATAFILE/XIFENFEI.256.961144003
ASMCMD>

这里通过asmcmd的ls命令,可以看到虽然我们存储的为datanew磁盘组的别名文件,实际上是link到asm的omf方式的文件(本质上asm中的文件都是omf方式存储,只是在使用的时候体现asm的客户端程序方式不一样,是直接asm中的omf方式,还是asm中的别名).

rman copy datafile 15
通过rman copy把datafile 15 拷贝到和datafile 14别名一样的文件了

RMAN> copy datafile 15 to '+datanew/xifenfei.dbf';

Starting backup at 27-NOV-17
using channel ORA_DISK_1
channel ORA_DISK_1: starting datafile copy
input datafile file number=00015 name=+DATA/XFF/DATAFILE/xifenfei.277.961143825
output file name=+DATANEW/xifenfei.dbf tag=TAG20171127T082731 RECID=5 STAMP=961144053
channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:03
Finished backup at 27-NOV-17


ASMCMD> ls -l
Type      Redund  Striped  Time             Sys  Name
                                            Y    XFF/
DATAFILE  UNPROT  COARSE   NOV 27 08:00:00  N    xifenfei.dbf => +DATANEW/XFF/DATAFILE/XIFENFEI.256.961144003
ASMCMD> cd xff
ASMCMD> ls
DATAFILE/
ASMCMD> cd datafile
ASMCMD> ls
XIFENFEI.256.961144003
ASMCMD>

这里可以看出来,在data磁盘组中,file 14被file 15覆盖掉了

rename file
把data磁盘组中的数据文件rename 到datanew磁盘组中

SQL> alter database rename file '+DATA/XFF/DATAFILE/xifenfei.276.961143809' to '+datanew/xifenfei.dbf';

Database altered.

SQL> alter database rename file '+DATA/XFF/DATAFILE/xifenfei.277.961143825' to '+datanew/xifenfei.dbf';
alter database rename file '+DATA/XFF/DATAFILE/xifenfei.277.961143825' to '+datanew/xifenfei.dbf'
*
ERROR at line 1:
ORA-01511: error in renaming log/data files
ORA-01523: cannot rename data file to '+data/xifenfei.dbf' - file already part of database

这里我们可以看到,file 14 rename 成功,但是file 15 rename失败,因为在数据库中，已经有了别名的文件(数据文件的路径)

omf自动删除文件
查看原磁盘组datanew中,发现datafile 14被自动删除

ASMCMD> pwd
+DATA/XFF/DATAFILE
ASMCMD> ls -l
Type      Redund  Striped  Time             Sys  Name
DATAFILE  UNPROT  COARSE   NOV 27 08:00:00  Y    SYSAUX.257.942061433
DATAFILE  UNPROT  COARSE   NOV 27 08:00:00  Y    SYSTEM.256.942061393
DATAFILE  UNPROT  COARSE   NOV 27 08:00:00  Y    UNDOTBS1.258.942061449
DATAFILE  UNPROT  COARSE   NOV 27 08:00:00  Y    USERS.259.942061449
DATAFILE  UNPROT  COARSE   NOV 27 08:00:00  Y    XIFENFEI.277.961143825
ASMCMD>

alert日志证实数据文件被删除

2017-11-27T09:05:03.054741-05:00
alter database rename file '+DATA/XFF/DATAFILE/xifenfei.276.961143809' to '+datanew/xifenfei.dbf'
2017-11-27T09:05:03.114947-05:00
NOTE: Under CF enqueue, no dependency request for disk group DATANEW
Deleted Oracle managed file +DATA/XFF/DATAFILE/xifenfei.276.961143809
Completed: alter database rename file '+DATA/XFF/DATAFILE/xifenfei.276.961143809' to '+datanew/xifenfei.dbf'
2017-11-27T09:05:21.471474-05:00
alter database rename file '+DATA/XFF/DATAFILE/xifenfei.277.961143825' to '+data/xifenfei.dbf'
ORA-1511 signalled during:alter database rename file
      '+DATA/XFF/DATAFILE/xifenfei.277.961143825' to'+datanew/xifenfei.dbf'

这里可以证实，数据文件的omf方式管理,在数据文件执行rename file的时候,会自动删除掉老的数据文件.这里悲剧已经发生,由于rman copy 覆盖了datanew磁盘组中的datafile 14,rename file又导致data磁盘组中的datafile 14被自动删除,从而使得datafile 14这个数据文件在两个磁盘组中都丢失.从常规角度来说,如果没有合适的备份该文件无法恢复.如果遭遇到oracle asm中数据文件丢失或者部分覆盖,请保护现场,联系我们(ORACLE数据库恢复技术支持),将为您提供专业数据库技术支持：Phone:17813235971    Q Q:107644445    E-Mail:dba@xifenfei.com最大限度抢救您的数据

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