[20130115]测试从asm中取出spfile文件以及一个数据文件.txt
参考: http://www.xifenfei.com/3019.html 使用dd复制asm中文件
1.取出spfile看看:
--从以上提示可以猜出spfile文件在/dev/sda7的92*Au size偏移处。
--将以上的输出作为执行文件执行，注意test01.dbf文件在当前目录不存在。
--恢复大小为11M比实际大，但是并不影响实际检测。
参考: http://www.xifenfei.com/3019.html 使用dd复制asm中文件
SQL> column name format a50
SQL> select file#,ts#,status,enabled,checkpoint_change#,name,bytes from v$datafile;
FILE# TS# STATUS ENABLED CHECKPOINT_CHANGE# NAME BYTES
---------- ---------- ------- ---------- ------------------ -------------------------------------------------- ----------
1 0 SYSTEM READ WRITE 6438423 +DATA/test/datafile/system.270.762883167 775946240
2 1 ONLINE READ WRITE 6438423 +DATA/test/datafile/sysaux.269.762883167 597688320
3 2 ONLINE READ WRITE 6438423 +DATA/test/datafile/undotbs1.267.762883167 519045120
4 4 ONLINE READ WRITE 6438423 +DATA/test/datafile/users.266.762883167 722206720
5 6 ONLINE READ WRITE 6438423 +DATA/test/datafile/example.268.762883167 104857600
6 7 ONLINE READ WRITE 6438423 +DATA/test/datafile/tools.280.762943407 104857600
7 8 ONLINE READ WRITE 6438423 +DATA/test/datafile/test.284.770380219 10485760
8 10 ONLINE READ WRITE 6438423 +DATA/test/datafile/mssm.291.771757063 104857600
8 rows selected.
1.取出spfile看看:
SQL> SELECT GROUP_NUMBER, FILE_NUMBER, NAME FROM v$asm_alias WHERE upper(NAME) LIKE '%SPFILE%' GROUP BY GROUP_NUMBER, FILE_NUMBER, NAME;
GROUP_NUMBER FILE_NUMBER NAME
------------ ----------- ----------------------
1 258 spfiletest.ora
1 258 spfile.258.762881973
SQL> SELECT disk_kffxp, au_kffxp, xnum_kffxp FROM x$kffxp WHERE GROUP_KFFXP=1 AND NUMBER_KFFXP=258;
DISK_KFFXP AU_KFFXP XNUM_KFFXP
---------- ---------- ----------
0 92 0
SQL> column path format a40
SQL> select DISK_NUMBER,GROUP_NUMBER,PATH from v$asm_disk;
DISK_NUMBER GROUP_NUMBER PATH
----------- ------------ ----------------------------------------
1 0 /dev/raw/raw2
0 1 /dev/raw/raw1--注:当前 /dev/raw/raw2没有使用
# raw -qa
/dev/raw/raw1: bound to major 8, minor 7
/dev/raw/raw2: bound to major 8, minor 8
# cat /proc/partitions
major minor #blocks name
8 0 142737408 sda
8 1 40131 sda1
8 2 200812 sda2
8 3 20008957 sda3
8 4 1 sda4
8 5 3911796 sda5
8 6 97667136 sda6
8 7 16611178 sda7
8 8 4289323 sda8
--从以上提示可以猜出spfile文件在/dev/sda7的92*Au size偏移处。
dd if=/dev/sda7 bs=1024k count=1 skip=92 f=spfile_test.ora
# strings spfile_test.ora
test.__db_cache_size=620756992
test.__java_pool_size=16777216
test.__large_pool_size=16777216
test.__oracle_base='/u01/app/oracle'#ORACLE_BASE set from environment
test.__pga_aggregate_target=654311424
test.__sga_target=973078528
test.__shared_io_pool_size=0
test.__shared_pool_size=301989888
test.__streams_pool_size=0
*.audit_file_dest='/u01/app/oracle/admin/test/adump'
*.audit_trail='db'
*.compatible='11.2.0.0.0'
*.control_files='+DATA/test/controlfile/current.272.762883123','+DATA/test/controlfile/current.271.762883125'#Restore Controlfile
*.db_block_size=8192
*.db_create_file_dest='+DATA'
*.db_domain='com'
*.db_file_multiblock_read_count=16
*.db_name='test'
*.db_recovery_file_dest='+DATA'
*.db_recovery_file_dest_size=1073741824
*.diagnostic_dest='/u01/app/oracle'
*.dispatchers='(PROTOCOL=TCP) (SERVICE=testXDB)'
*.log_archive_format='%t_%s_%r.dbf'
*.memory_target=0
*.nls_territory='AMERICA'
*.open_cursors=300
*.pga_aggregate_target=0
*.processes=150
*.remote_login_passwordfile='EXCLUSIVE'
*.result_cache_max_result=100
*.result_cache_max_size=25165824
*.undo_tablespace='UNDOTBS1'
2.取出另外一个数据文件+DATA/test/datafile/test.284.770380219文件大小10485760。
10485760/1024/1024=10+加上os的块头8k，占用11M。
SQL> SELECT GROUP_NUMBER, FILE_NUMBER, NAME FROM v$asm_alias WHERE upper(NAME) LIKE '%TEST%' GROUP BY GROUP_NUMBER, FILE_NUMBER, NAME;
GROUP_NUMBER FILE_NUMBER NAME
------------ ----------- -------------------
1 258 spfiletest.ora
1 284 TEST.284.770380219
1 4294967295 TEST--后面那个是我实例的目录。TEST.284.770380219的NUMBER_KFFXP=284.
SQL> SELECT disk_kffxp, au_kffxp, xnum_kffxp FROM x$kffxp WHERE GROUP_KFFXP=1 AND NUMBER_KFFXP=284;
DISK_KFFXP AU_KFFXP XNUM_KFFXP
---------- ---------- ----------
0 2676 0
0 2677 1
0 2672 2
0 2673 3
0 2674 4
0 2675 5
0 2576 6
0 2577 7
0 2578 8
0 2579 9
0 2580 10
11 rows selected.
SQL> column x format a60
SQL> select 'dd if=/dev/sda7 bs=1024k count=1 skip='||AU_KFFXP||' >>test01.dbf' x from x$kffxp
WHERE GROUP_KFFXP=1 AND NUMBER_KFFXP=284 order by XNUM_KFFXP;
X
------------------------------------------------------------
dd if=/dev/sda7 bs=1024k count=1 skip=2676 >>test01.dbf
dd if=/dev/sda7 bs=1024k count=1 skip=2677 >>test01.dbf
dd if=/dev/sda7 bs=1024k count=1 skip=2672 >>test01.dbf
dd if=/dev/sda7 bs=1024k count=1 skip=2673 >>test01.dbf
dd if=/dev/sda7 bs=1024k count=1 skip=2674 >>test01.dbf
dd if=/dev/sda7 bs=1024k count=1 skip=2675 >>test01.dbf
dd if=/dev/sda7 bs=1024k count=1 skip=2576 >>test01.dbf
dd if=/dev/sda7 bs=1024k count=1 skip=2577 >>test01.dbf
dd if=/dev/sda7 bs=1024k count=1 skip=2578 >>test01.dbf
dd if=/dev/sda7 bs=1024k count=1 skip=2579 >>test01.dbf
dd if=/dev/sda7 bs=1024k count=1 skip=2580 >>test01.dbf
11 rows selected.
--将以上的输出作为执行文件执行，注意test01.dbf文件在当前目录不存在。
# ll test01.dbf
-rw-r--r-- 1 root root 11534336 Jan 15 16:49 test01.dbf
--恢复大小为11M比实际大，但是并不影响实际检测。
$ dbv file=test01.dbf
DBVERIFY: Release 11.2.0.1.0 - Production on Tue Jan 15 16:49:40 2013
Copyright (c) 1982, 2009, Oracle and/or its affiliates. All rights reserved.
DBVERIFY - Verification starting : FILE = /home/oracle/aulasm/test01.dbf
DBVERIFY - Verification complete
Total Pages Examined : 1280
Total Pages Processed (Data) : 103
Total Pages Failing (Data) : 0
Total Pages Processed (Index): 105
Total Pages Failing (Index): 0
Total Pages Processed (Other): 146
Total Pages Processed (Seg) : 0
Total Pages Failing (Seg) : 0
Total Pages Empty : 926
Total Pages Marked Corrupt : 0
Total Pages Influx : 0
Total Pages Encrypted : 0
Highest block SCN : 3853639 (0.3853639)
$ dbv file='+DATA/test/datafile/test.284.770380219' userid=sys/XXXXX
DBVERIFY: Release 11.2.0.1.0 - Production on Tue Jan 15 17:00:07 2013
Copyright (c) 1982, 2009, Oracle and/or its affiliates. All rights reserved.
DBVERIFY - Verification starting : FILE = +DATA/test/datafile/test.284.770380219
DBVERIFY - Verification complete
Total Pages Examined : 1280
Total Pages Processed (Data) : 103
Total Pages Failing (Data) : 0
Total Pages Processed (Index): 105
Total Pages Failing (Index): 0
Total Pages Processed (Other): 146
Total Pages Processed (Seg) : 0
Total Pages Failing (Seg) : 0
Total Pages Empty : 926
Total Pages Marked Corrupt : 0
Total Pages Influx : 0
Total Pages Encrypted : 0
Highest block SCN : 0 (0.0)
