Parnassus data recovery manager for oracle database user guide v0.3

ParnassusData Technical White Paper
Dec 2013
ParnassusData Recovery Manager
For Oracle Database User Guide V0.3
Creation Date: Feb 09, 2014
Last Update: Jul 20, 2014
Version: <Version 0.2>

ParnassusData Recovery Manager For Oracle Database
ParnassusData www.parnassusdata.com 2
Document Control
Author
Maclean Liu
Feng Bo
Change Logs
Date Author Version Change Log
Feb 09, 2014 Maclean Liu Created.
Apr 14,2014 Maclean Liu V0.2
Apr 25,2014 Maclean Liu Recovery From DROP
TABLESPACE
June 25, 2014 Feng Bo Translation
July 14,2014 Maclean Liu Review
Reviewers
Name Position
ZhangYang Hu
HanJue Xu
Approvals
<Approver 1> ZhangYang Hu
<Approver 2>
Distribution
Copy No. Name Location

Contents
Document Control.............................................................................................................. 2
Author......................................................................................................................... 2
Change Logs................................................................................................................ 2
Reviewers.................................................................................................................... 2
Approvals.................................................................................................................... 2
Distribution................................................................................................................. 2
Summary ............................................................................................................................ 4
Why PRM is necessary?...................................................................................................... 5
PRM Software Introduction ............................................................................................... 6
PRM installation and boot................................................................................................ 12
Windows:........................................................................................................... 12
Linux/Unix:....................................................................................................... 14
PRM License Registration ................................................................................................ 16
Case Study on Oracle database recovery via PRM .......................................................... 20
CASE 1: Truncate table by mistake........................................................................... 20
CASE 2: Recovery MIS-truncated table by DataBridge ............................................ 37
Case 3: Oracle Dictionary Corrupted, DB can not be open....................................... 45
Case 4: Deleted SYSTEM tablespace by mistake....................................................... 47
CASE 5:deleted System Tablespace and Part of User tablespace datafile by mistake
....................................................................................................................................... 59
CASE 6: rescue datafile from damaged diskgroup which can’t be mounted........... 60
CASE 7: DB(stored in ASM) can not be opened ....................................................... 68
CASE 8: Recover Lost system tablespace in ASM..................................................... 72
CASE 9: Recover DROP TABLESPACE Data ........................................................... 75
CASE 10: Recover Data after Dropping Table by mistake........................................ 87
FAQ .................................................................................................................................. 96
Find More......................................................................................................................... 98
Conclusion........................................................................................................................ 98

Summary
ParnassusData Recovery Manager (PRM) is an enterprise Oracle database
recovery tool, which can extract database datafile from Oracle 9i, 10g, 11g, 12c
directly without any SQL execution on database. ParnassusData Recovery
Manager was developed by Java, which can be used cross platforms. It can be
run without any installation. Download it, and click to run
PRM has full rich GUI for any command. It is not necessary to learn script or
master any skill in Oracle data structure. Recovery Wizard is integrated in the
tool.
Picture 1

Why PRM is necessary?
Isn’t RMAN enough for ORACLE database recovery? Why need PRM for
Oracle recovery?
In modern growing IT systems, database size is growing geometrically. Oracle
DBAs are facing the problem that disks are insufficient for full backup, and
tape storages take much more time than usual expectation.
Truth been told, “Database, backup 1st” is the first lesson for DBAs, however
that fact is : disk space is not sufficient, new storage is still on the way, even the
backup image may not work.
In order to solve the above problems, PD Recovery Manager integrates the
algorithm in Oracle database data structure, boot process which can solve
system table lost, data dictionary error, and storage corruption impaction. In
addition, it can also recovery the data from Truncate/DROP mistake.
No matter you are a professional DBA or new fish in Oracle world, you can
master this user-friendly tool immediately. PRM is easy to install and use. You
don’t need to have any Oracle deep knowledge or skill in scripts, but just
click-by-click finishing all recovery process.
Comparing the traditional recovery tool like Oracle DUL that is an Oracle
internal tool and only for Oracle employee usage. PRM can be used for any
kind of IT professionals or geeks. It saves time, decreases the recovery failure,
and cuts down the total cost of enterprise.
There are 2 modes for data recovery:
By traditional way, data has to be extract to text file and then insert to new DB
by SQLLDR tools, which takes double time and occupies double storage size.
ParnassusData Recovery Manager integrates data bridge features, which can
extract data from original source database and then insert into new destination
database without any inter-media. This is a truly time and storage saver.
Oracle ASM is becoming popular in enterprise database implementation, due
to its advantage in high performance, cluster support, and easy administration.
However, for many IT professionals, ASM is a black box. Once ASM occurs
error in disk group mounting, it means that all data is locked in ASM. In this
circumstance, without PRM, only senior Oracle experts can patch ASM internal
structure, which is also a problem for oracle normal user.

PRM now can support two kinds of ASM data recovery：
1. Once Disk Group cannot be mounted, PRM can read metadata, and clone
ASM file from Disk Group
2. Once Disk Group cannot be mounted, PRM can read ASM file and extract
data, which supports data export, and data bridge 2 modes
PRM Software Introduction
ParnassusData Recovery Manager (PRM) was developed by Java, which
ensured cross-platform ability. No matter AIX, Solaris, HPUNIX, Red-Hat,
Oracle Linux, SUSE, or Window, It can be run smoothly.
PRM Supports OS & Platform：
Platform Name Supported
AIX POWER 
Solaris Sparc 
Solaris X86 
Linux X86 
Linux X86-64 
HPUX 
MacOS 
PRM Supported Database Version:
ORACLE DATABASE VERSION Supported
Oracle 7 
Oracle 8 
Oracle 8i 
Oracle 9i 
Oracle 10g 
Oracle 11g 
Oracle 12c 

Considering many servers run early OS like AIX 4.3 that can not install the
latest JD, PRM was developed by JDS 1.4.
In addition, Oracle 10g database integrated JDK 1.4, and 11g with JDK 1.5.
Therefore, users can run PRM directly without any JDK updates or installation
For users who needs JDK 1.4, please download from below link:
http://www.oracle.com/technetwork/java/javasebusiness/downloads/java-a
rchive-downloads-javase14-419411.html
ParnassusData strongly recommend user to use Open JDK on Linux, for less
bug and performance purpose.
Open JDK For Linux download Link:
Open jdk x86_64 for Linux 5 http://pan.baidu.com/s/1qWO740O
Tzdata-java x86_64 for Linux 5 http://pan.baidu.com/s/1gdeiF6r
Open jdk x86_64 for Linux 6 http://pan.baidu.com/s/1mg0thXm
Open jdk x86_64 for Linux 6 http://pan.baidu.com/s/1sjQ7vjf
Open jdk x86 for Linux 5 http://pan.baidu.com/s/1kT1Hey7
Tzdata-java x86 for Linux 5 http://pan.baidu.com/s/1kT9iBAn
Open jdk x86 for Linux 6 http://pan.baidu.com/s/1sjQ7vjf
Tzdata-java x86 for Linux 6 http://pan.baidu.com/s/1kTE8u8n
JDK on Other platform downloads:
AIX JAVA SDK 7 http://pan.baidu.com/s/1i3JvAlv
JDK Windows x86 http://pan.baidu.com/s/1qW38LhM
JDK Windows x86-64 http://pan.baidu.com/s/1qWDcoOk
Solaris JDK 7 x86-64bit http://pan.baidu.com/s/1gdzgSvh
Solaris JDK 7 x86-32bit http://pan.baidu.com/s/1mgjxFlQ
Solaris JDK 7 Sparc http://pan.baidu.com/s/1pJjX3Ft

PRM runs at least on JAVA JDK 1.4. Parnassus Data strongly
recommends you to run it on JDK 1.6, since comparing JDK 1.5, JDK
1.6 has a lot of performance tuning in code and running environment.
Therefore, it can be faster for recovering on JDK 1.6
PRM hardware requirement:
CPU At least 800 MHZ
Memory At least 512 MB
Disk At least 50 MB
PRM recommended hardware requirement:
CPU 2.0 GHZ
Memory 2 GB
Disk 2 GB
PRM Language Support
Language Character Set Encoding
Simplified/Traditional
Chinese
ZHS16GBK GBK
Chinese
ZHS16DBCS CP935
Chinese
ZHT16BIG5 BIG5
Chinese
ZHT16DBCS CP937
Chinese
ZHT16HKSCS CP950

Chinese
ZHS16CGB231280 GB2312
Chinese
ZHS32GB18030 GB18030
Japanese JA16SJIS SJIS
Japanese JA16EUC EUC_JP
Japanese JA16DBCS CP939
Korean KO16MSWIN949 MS649
Korean KO16KSC5601 EUC_KR
Korean KO16DBCS CP933
French WE8MSWIN1252 CP1252
French WE8ISO8859P15 ISO8859_15
French WE8PC850 CP850
French WE8EBCDIC1148 CP1148
French WE8ISO8859P1 ISO8859_1
French WE8PC863 CP863
Deutsch WE8MSWIN1252 CP1252
Deutsch WE8ISO8859P15 ISO8859_15
Deutsch WE8PC850 CP850
Deutsch WE8EBCDIC1141 CP1141
Deutsch WE8ISO8859P1 ISO8859_1
Deutsch WE8EBCDIC1148 CP1148
Italian WE8MSWIN1252 CP1252
Italian WE8ISO8859P15 ISO8859_15
Italian WE8PC850 CP850
Italian WE8EBCDIC1144 CP1144
Thai TH8TISASCII CP874
Thai TH8TISEBCDIC TIS620
Arabic AR8MSWIN1256 CP1256
Arabic AR8ISO8859P6 ISO8859_6
Arabic AR8ADOS720 CP864
Spanish WE8MSWIN1252 CP1252
Spanish WE8ISO8859P1 ISO8859_1

Spanish WE8PC850 CP850
Spanish WE8EBCDIC1047 CP1047
Portuguese WE8MSWIN1252 CP1252
Portuguese WE8ISO8859P1 ISO8859_1
Portuguese WE8PC850 CP850
Portuguese WE8EBCDIC1047 CP1047
Portuguese WE8ISO8859P15 ISO8859_15
Portuguese WE8PC860 CP860
Features Supported
Features Supported
Cluster Table YES
Inline or out-of-line LOBS, different
chunk version and size, LOB partition
YES
Heap table, partitioned or
non-partitioned
YES
Partition and Subpartition YES
Table With chained rows ,migrated
rows,intra-block chaining
YES
Bigfile Tablespace YES
ASM Automatic Storage Management
10g,11g,12c,diskgroups are dismounted
YES
ASM 11g Variable Extent Size YES
IOT, partitioned or non-partitioned YES(Future)
Basic Compressed Heap table YES(Future)
Advanced Compressed Heap Table NO
Exudates HCC Heap Table NO
Encrypted Heap Table NO
Table with Virtual Column NO
Attention: for virtual column、11g optimized default column, it may lose some
column, and these two are new feature and less used in production
environment.

PRM supports data type:
Data Type Supported
BFILE No
Binary XML No
BINARY_DOUBLE Yes
BINARY_FLOAT Yes
BLOB Yes
CHAR Yes
CLOB and NCLOB Yes
Collections (including VARRAYS and nested tables) No
Date Yes
INTERVAL DAY TO SECOND Yes
INTERVAL YEAR TO MONTH Yes
LOBs stored as SecureFiles Future
LONG Yes
LONG RAW Yes
Multimedia data types (including Spatial, Image, and Oracle Text) No
NCHAR Yes
Number Yes
NVARCHAR2 Yes
RAW Yes
ROWID, UROWID Yes
TIMESTAMP Yes
TIMESTAMP WITH LOCAL TIMEZONE Yes
TIMESTAMP WITH TIMEZONE Yes
User-defined types No
VARCHAR2 and VARCHAR Yes
XMLType stored as CLOB No
XMLType stored as Object Relational No
PRM supports ASM:

Function Supported
Directly extract Table data from ASM YES
Directly copy datafile from ASM YES
Repair ASM metadata YES
Draw ASM Structure by GUI Future
PRM installation and boot
It is not necessary to install PRM since it is Java developed software. Extract the
ZIP package and click to RUN
unzip prm_latest.zip
ParnassusData recommends you to run PRM with command line, therefore it
will show more diagnose information
Windows:
1. Make sure you had installed JDK and add JAVA to profile
2. Double click ‘prm.bat’ which is in the folder
prm.bat will launch PRM in the back

Then, it pops up PRM main interface：

Linux/Unix:
In Linux/Unix, use X Server for GUI
1. Make sure you had installed JDK and add Java to profile
2. cd to PRM folder, and run./prm.sh to start the tool

PRM License Registration
ParnassusData Recovery Manager (PRM) needs license for full use.
ParnassusData provide community version for user testing and demo.
(Community version has no limits on ASM close, and we will add more
function on it)
It needs license for full use of PRM. Now, clients have two kinds of license:
Standard Edition and Enterprise Edition,
Clients can purchase license via office website: www.parnassusdata.com, and it
needs Database name. After your purchasing, you will receive an email which
includes DBNAME and License Key
Once you have License Key, please register the software as below;
Menu Help => Register
Input DB NAME and you License Key, then click Register button
After registration, you don’t need to input license key again on your next boot.

Your successful registration information is in Help=>about

Case Study on Oracle database recovery via PRM
CASE 1: Truncate table by mistake
User D had truncated a table by mistake on production environment. The DBA
tried to recover table from RMAN backup, and accidently the backup is
unavailable. Therefore DBA decided to use PRM for rescuing all truncated
data.
Since all database system files are healthy, DBA just needs to load SYSTEM
table data file in dictionary mode and TRUNCATED table file. For example:
create table ParnassusData.torderdetail_his1 tablespace users as
select * from parnassusdata.torderdetail_his;
SQL> desc ParnassusData.TORDERDETAIL_HIS
Name Null? Type
----------------------- -------- --------------
SEQ_ID NOT NULL NUMBER(10)
SI_STATUS NUMBER(38)
D_CREATEDATE CHAR(20)
D_UPDATEDATE CHAR(20)
B_ISDELETE CHAR(1)
N_SHOPID NUMBER(10)
N_ORDERID NUMBER(10)
C_ORDERCODE CHAR(20)
N_MEMBERID NUMBER(10)
N_SKUID NUMBER(10)
C_PROMOTION NVARCHAR2(5)
N_AMOUNT NUMBER(7,2)
N_UNITPRICE NUMBER(7,2)
N_UNITSELLINGPRICE NUMBER(7,2)
N_QTY NUMBER(7,2)
N_QTYFREE NUMBER(7,2)

N_POINTSGET NUMBER(7,2)
N_OPERATOR NUMBER(10)
C_TIMESTAMP VARCHAR2(20)
H_SEQID NUMBER(10)
N_RETQTY NUMBER(7,2)
N_QTYPOS NUMBER(7,2)
select count(*) from ParnassusData.TORDERDETAIL_HIS;
COUNT(*)
----------
984359
select bytes/1024/1024 from dba_segments where
segment_name='TORDERDETAIL_HIS' and
owner='PARNASSUSDATA';
BYTES/1024/1024
---------------
189.71875
SQL> truncate table ParnassusData.TORDERDETAIL_HIS;
Table truncated.
SQL> select count(*) from
ParnassusData.TORDERDETAIL_HIS;
COUNT(*)
----------
0

Run PRM, and select Tools =>Recovery Wizard
Click Next

Client did not user ASM storage, therefore just select ‘Dictionary Mode’:
Next, we need to select some characters: including Endian bit order and DBNAME

Since Oracle datafiles have different Endian bit orders on different OS, please choose
accordingly:
Solaris[tm] OE (32-bit) Big
Solaris[tm] OE (64-bit) Big
Microsoft Windows IA (32-bit) Little
Linux IA (32-bit) Little
AIX-Based Systems (64-bit) Big
HP-UX (64-bit) Big
HP Tru64 UNIX Little
HP-UX IA (64-bit) Big
Linux IA (64-bit) Little
HP Open VMS Little
Microsoft Windows IA (64-bit) Little
IBM zSeries Based Linux Big
Linux x86 64-bit Little
Apple Mac OS Big
Microsoft Windows x86 64-bit Little
Solaris Operating System (x86) Little
IBM Power Based Linux Big
HP IA Open VMS Little
Solaris Operating System (x86-64) Little
Apple Mac OS (x86-64) Little
In traditional UNIX, AIX (64-bit), UP-UNIX (64-bit), it use Big Endian bit order,

Usually, Linux X86/64, Windows remain default Little Endian:
Attention: if your data file was generated on AIX, if you want to recover data on window,
please select original Big Endian format.
Since the data file is on Linux X86, we select Little as Endian, and input database name.
(The input database name can be different from DB_NAME found in datafile header, the
input database name is just an alias. PRM will check if your PRM license is valid , the valid
license key is generated based on DB_NAME found in datafile header)

Click Next =>Click Choose Files
Usually, if the database is not too big, we could select all data files together; if the database
capacity is huge and DBA knows the data location, at least you should select both
SYSTEM tablespace and specified datafile.
Attention, the GUI Supports Ctrl + A & Shift short keys:

Specify the Block Size (Oracle data block size) according to the real circumstance. For
example, if default DB_BLOCK_SIZE is 8K, but part of tablespaces’ block size is 16k,then
user has to specify them as correct block size one by one.
OFFSET setting are just for raw device storage mode, for example: on AIX, based on LV of
normal VG, the offset will be 4k OFFSET.
If you are using raw device but don’t know what the OFFSET is, please use dbfsize tool
which is under $ORACLE_HOME/bin
$dbfsize /dev/lv_control_01
Database file: /dev/lv_control_01
Database file type: raw device without 4K starting offset
Database file size: 334 16384 byte blocks
Since all data file block size here is 8K and there is no OFFSET, please click load:

PRM read Oracle dictionary directly, and recreate a new dictionary in embedded database.
It can help us to recuse most types of data in Oracle DB.
After recreating dictionary, the dialog show character information:

Attention: PRM supports multiple languages and multiple Oracle character set. However,
the prerequisite is the OS had installed specified language packages. For example, on
Windows, if you didn’t install Chinese language package, even Oracle database characters
are independent and support ZHS16GBK, PRM would display Chinese as messy code.
Once the Chinese language package is installed on OS, PRM can display multibyte
character set properly.
Similarly, on Linux, it need font-Chinese language package.
[oracle@mlab2 log]$ rpm -qa|grep chinese
fonts-chinese-3.02-12.el5
After loading, in PRM GUI, it displayed database tree diagram by database users.
Click Users, you can find more users, for example, if user want to recover a table under
PARNASSUSDATA SCHEMA, click PARNASSUSDATA, and double click that table:

Previously TORDERDETAIL_HIS had been truncated, so it won’t show any data .
Please select unload truncated Data:

PRM will scan the tablespace and extract data from truncated table.

As in the above picture, the truncated TORDERDETAIL_HIS had exported 984359
record, and saved to specified falt file.
In addition, it generated SQLLDR control file for text data importing
$ cd /home/oracle/prm/prmdata/parnassus_dbinfo_PARNASSUSDATA/
$ ls -l ParnassusData*
-rw-r--r-- 1 oracle oinstall 495 Jan 18 08:31
ParnassusData.torderdetail_his.ctl
-rw-r--r-- 1 oracle oinstall 191164826 Jan 18 08:32
ParnassusData.torderdetail_his.dat.truncated
$ cat ParnassusData.torderdetail_his.ctl
LOAD DATA

INFILE 'ParnassusData.torderdetail_his.dat.truncated'
APPEND
INTO TABLE ParnassusData.torderdetail_his
FIELDS TERMINATED BY ' '
OPTIONALLY ENCLOSED BY '"'
TRAILING NULLCOLS (
"SEQ_ID" ,
"SI_STATUS" ,
"D_CREATEDATE" ,
"D_UPDATEDATE" ,
"B_ISDELETE" ,
"N_SHOPID" ,
"N_ORDERID" ,
"C_ORDERCODE" ,
"N_MEMBERID" ,
"N_SKUID" ,
"C_PROMOTION" ,
"N_AMOUNT" ,
"N_UNITPRICE" ,
"N_UNITSELLINGPRICE" ,
"N_QTY" ,
"N_QTYFREE" ,
"N_POINTSGET" ,
"N_OPERATOR" ,
"C_TIMESTAMP" ,
"H_SEQID" ,
"N_RETQTY" ,
"N_QTYPOS"
)
When you import data to original table, ParnassusData strongly recommends you to
modify SQLLDR table name as a temp table, it would not impact your previous
environment.

$ sqlldr control=ParnassusData.torderdetail_his.ctl direct=y
Username:/ as sysdba
//user SQLLDR to import data
//Minus can be used for data comparing
select * from ParnassusData.torderdetail_his minus select * from
parnassus.torderdetail_his;
no rows selected
After diffing, there is no difference between original data and PRM exported data.
PRM successfully recovered the truncated table

CASE 2: Recovery MIS-truncated table by
DataBridge
In Case 1, we use traditional unload+sqlldr for data recovery, but actually
ParnassusData would like to strongly recommend using DataBridge Feature for
recovering.
Why use DataBridge?
• Traditional unload+sqlldr means a copy of data needs to be saved as flat file on
filesystem first, data has to be loaded into Unicode text file and then inserted into
destination database by sqlldr, this will take double storage and double time.
• DataBridge can extract data from source DB and export to destination DB without
any intermediary.
• Once the data arrived destination DB, user can begin to validate them.
• If source and destination database located on different servers, then read/write IO
will be balanced on two servers , MTTR will be saved.
• If DataBridge is used in truncated table recovery, it is very convenient that
truncated data can be exported back to problem database directly.
DataBridge is very simple and convenient. Right click the table on the left side, and select
DataBridge:

As the first time to use DataBridge, DB connection information is necessary, which is
similar with SQL Developer connection, including: DB host, Port, Service_Name and
Account information.
Attention: DataBridge will save data to the specified schema given in the DB connection.

AS above G10R25 connection, user is maclean, and the corresponding Oracle Easy
Connection is
192.168.1.191:1521/G10R25。
After inputting the account/connection information, you can use test for connection
testing. If return message is “ Connect to DB server successfully “, the connection is done
and click to save.

After saving connection and go to DataBridge window, please select Connection G10R25
at the drop down list.
If your DB connection is not in the drop down list, please click DB connection Button,
which is highlighted in red.

After selecting DB Connection, Tablespace dropdown list will be selectable:

Attention on DataBridge recovering truncated/dropped table: when
you recovering truncated/dropped and insert data back to source DB,
users should choose another tablespace which diffs from the original
tablespace. If export data into same tablespace, oracle will reuse space
which stores truncated/dropped table, and can make data overwritten,
we will lose the last resort to recover the data.
For example, we truncated a table and would like to user DataBridge to recover data
back to source database, but we would like to use another table name. Original table name
is torderdetail_his, and user can select “if need to remap table” and input proper
destination name, as below:
Attention: 1) For destination DB which already had the same table
name, PRM will not recreate a table but append all recovered data. 2)
For destination DB which did not have source table name, PRM would
try to create table and recover the data.
In this case, we would recover Truncated data, therefore, please select “if data truncated?”
checkbox, Or, PRM would do regular data extraction, but not Truncated data.

Truncate recovery methodology is: Oracle will only update table DATA_OBJECT_ID in
data dictionary and segment header. Therefore, the real data will not be overwritten. Due
to the difference between dictionary and DATA_OBJECT_ID, Oracle server process will not
read truncated data while scanning table. But, the real data is still there.
PRM will try to scan 10M-bytes blocks which are behind of the table’s segment header, if
some blocks with smaller DATA_OBJECT_ID than the object’s current DATA_OBJECT_ID,
then PRM thinks it find something useful.
There is a blank input field called ”if to specify data object id”, which let user input Data
Object ID. Usually, you don’t need to input any value, unless the recovery does not work.
We suggest user to contact ParnassusData for help.
Click DataBridge button ,then it will start extracting if the configuration is done.
DataBridge will display the successfully rescued rows and elapsed time.

Case 3: Oracle Dictionary Corrupted, DB can not
be open
DBA of company D deleted SYS.TS$ (A bootstrap Table) by mistake, this cause Oracle
DB can not be open
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
With the Partitioning, Automatic Storage Management, OLAP, Data Mining
and Real Application Testing options
INSTANCE_NAME
----------------
ASMME
SQL>
SQL>
SQL> select count(*) from sys.ts$;
COUNT(*)
----------
5
SQL> delete ts$;
5 rows deleted.
SQL> commit;
Commit complete.
SQL> shutdown immediate;
Database closed.
Database dismounted.
ORACLE instance shut down.

Database mounted.
ORA-01092: ORACLE instance terminated. Disconnection forced
ORA-01405: fetched column value is NULL
Process ID: 5270
Session ID: 10 Serial number: 3
Undo initialization errored: err:1405 serial:0 start:3126020954 end:3126020954 diff:0 (0
seconds)
Errors in file /s01/diag/rdbms/asmme/ASMME/trace/ASMME_ora_5270.trc:
Errors in file /s01/diag/rdbms/asmme/ASMME/trace/ASMME_ora_5270.trc:
Error 1405 happened during db open, shutting down database
USER (ospid: 5270): terminating the instance due to error 1405
Instance terminated by USER, pid = 5270
ORA-1092 signalled during: ALTER DATABASE OPEN...
opiodr aborting process unknown ospid (5270) as a result of ORA-1092
In this circumstance, data dictionary had been damaged; therefore it would be very hard
to open the database.
Then, we can use PRM rescue data in DB. Following processes as below:
1. Recovery Wizard
2. Select Data Dictionary Mode
3. Choose Big or Little Endian , and input DB NAME
4. Click Load for database loading
5. Extract Tables

Case 4: Deleted SYSTEM tablespace by mistake
A System Administrator of company D who deleted SYSTEM tablespace by mistake and
make DB can not be open. Unfortunately, there is no RMAN backup available. Therefore,
for company D try to use PRM to recover all data.
In this circumstance, run PRM and go into Recovery Wizard. Select “Non-Dictionary
mode”:

In No-dictionary mode, we have to select DB Character Set and DB National Character

Set. Because of while losing SYSTEM tablespace, database cannot find character set
information.
Similarly as case 1, select all data (not including temp file), and correct Block Size and
OFFSET
Then click scan button. Then PRM will scan all segment header and extents in datafile,
and record it into SEG$.DAT and EXT$.DAT. In Oracle, each partition table or
non-partition table has a segment header. Once we find segment header, we could find the
whole table extent map information. Via extent map, we can get all record.
There is one exception, for example, there is one non-partition table that is stored in two
database files. The segment header and half data are stored in datafile A, and the others are
on datafile B. While system tablespace and datafile A are lost, PRM couldn’t find segment
header associated with problem table, but it can scan datafile B and get the rest extent map.
In order to recover data via segment header and extent map in no-dictionary mode.
PRM will create two files: SEG$.DAT(stores segment header info) and EXT$.DAT(stores
extent info) ,which is also recorded in PRM embedded database.

After scan, there is database icon on the left.
Meanwhile, there are 2 option:
1、 Scan Tables From Segments:
 System tablespace lost, but user tablespace datafiles are there
2、 Scan Tables From Extents
 Only used when truncated data can not be recovered by
Dictionary-Mode
 Both system tablespace and segment header are lost
It is not necessary to use mode “Scan Tables From Extents” at the first time, unless you
can’t find your data by “Scan Tables From Segment”.
Scan tables From segments should be your first choice.

After scanning tables from segments, there will be a tree diagram on the left.

Scan Tables is for constructing the data based on segment header in SEG$. The name of
each node in the diagram is named by obj+ DATA OBJECT ID.
Click on node and check right side:

Intelligence on Data Analysis
Because of SYSTEM tablespace lost, there is not data structure information available in
NO-Dictionary mode. The column information includes column name and data type. All
these are storage in dictionary but not in table. Therefore, PRM need to guess the data type.
PRM has a JAVA pre analysis algorithm, and has the ability to analysis more than 10 kinds
of types.、
Intelligence analysis can successfully guess 90% of columns in most of circumstances
On the right side, the meaning of columns:
 Col1 no
 Seen Count

 MAX SIZE
 PCT NULL
 String Nice
 Number Nice
 Date Nice
 Timestamp Nice
 Timestamp with timezone Nice
Sample Data Analysis:
Intelligence Analysis will analyze 10 records and display the results. These results will
help client to know the column information.

As in the picture, the there are 10 records which had been displayed all.
TRY TO ANALYZE UNKNOWN column type:
If PRM cannot recognize the column’s data type , you can specify data type by yourself.
So far, PRM does not support below types:
XDB.XDB$RAW_LIST_T、XMLTYPE、Customized TYPE

Unload Statement:
PRM generated unload scripts, and these scripts can be only used by PRM support
engineers.
In “Non-Dictionary Mode”, Data Bridge is also applicable. Comparing ” Dictionary Mode”,
the manger difference that the user can define the type in data transferring. As below
picture, the column type is UNKNOW. These types might be PRM unsupported types for
example: XML and etc.
If the user know the data type in this table (from schema design documents), it is
necessary to specify the correct types manually.

CASE 5:deleted System Tablespace and Part of
User tablespace datafile by mistake
User D deleted the system tablespace and part of user tablespace datafile by mistake.
In this circumstance, part of user data table was deleted, and this might includes datafile
which stored segment header. Therefore it is better to use “Scan Tables From Extents” than”
Scan Tables From Segment Header”.
Steps as Below:
1. Go to Recovery Wizard, select No-Dictionary mode，and added all usable data file.
Then process them to scan database.
2. Select database, and right click Scan Tables From Extents
3. Analyze the data and implement data extraction and Data Bright
4. Following steps are the same with Case 4

CASE 6: rescue datafile from damaged diskgroup
which can’t be mounted
User D chooses ASM instead of other filesystem. Since there are many bugs in version
11.2.0.1, it may happen that ASM DISKGROUP cannot be mounted or it does not work
after repairing ASM Disk Header.
In this circumstance, user can use ASM Files Clone feature of PRM to rescue datafile
from damaged ASM DiskGroup directly.
1. Open main interface, and select ASM File(s) Clone:
2. Enter ASM Disks Window, and click SELECt…to add ASM Disks. For example:
/dev/asm-disk5(linux). And click ASM analyze.

3. ASM Files Clone feature will analyze ASM Disk header, in order to finding Disk group
file and File Extent Map. All the information is recorded into PRM embedded database.
PRM can collect all Metadata, and analyze to show diagram.

4. After analysis of ASM Analyze, PRM will find the file list in Disk groups. Users can
select the datafile/archivelog which need to be cloned to destination folder.
Click ASM Clone to start…

There is progress bar while file cloning.
ASM File Clone log as below:

Preparing selected files...
Cloning +DATA2/ASMDB1/DATAFILE/TBS2.256.839732369:
..........................1024MB
......................................2048MB
......................................3072MB
........................................4096MB
......................................5120MB
........................................6144MB
.....................................7168MB
.......................................8192MB
.......................................9216MB
.......................................10240MB
.......................................11264MB
.........................................12288MB
...........................................13312MB
..................................14336MB
............................................15360MB
.....................................16384MB
.......................................17408MB
.......................................18432MB
..........................................................................................................19456MB
..........................................
Cloned size for this file (in byte): 21475885056
Cloned successfully!
Cloning
+DATA2/ASMDB1/ARCHIVELOG/2014_02_17/thread_1_seq_47.257.839732751:
......
Cloning
+DATA2/ASMDB1/ARCHIVELOG/2014_02_17/thread_1_seq_48.258.839732751:
......
All selected files were cloned done.

5. It is necessary to validate cloned data via “dbv” or “rman validate”, for example:
rman target /
RMAN> catalog datafilecopy '/home/oracle/asm_clone/TBS2.256.839732369.dbf';
cataloged datafile copy
datafile copy file name=/home/oracle/asm_clone/TBS2.256.839732369.dbf RECID=2
STAMP=839750901
RMAN> validate datafilecopy '/home/oracle/asm_clone/TBS2.256.839732369.dbf';
Starting validate at 17-FEB-14
using channel ORA_DISK_1
channel ORA_DISK_1: starting validation of datafile
channel ORA_DISK_1: including datafile copy of datafile 00016 in backup set
input file name=/home/oracle/asm_clone/TBS2.256.839732369.dbf
channel ORA_DISK_1: validation complete, elapsed time: 00:03:35
List of Datafile Copies
=======================
File Status Marked Corrupt Empty Blocks Blocks Examined High SCN
---- ------ -------------- ------------ --------------- ----------
16 OK 0 2621313 2621440 1945051
File Name: /home/oracle/asm_clone/TBS2.256.839732369.dbf
Block Type Blocks Failing Blocks Processed
---------- -------------- ----------------
Data 0 0
Index 0 0
Other 0 127
Finished validate at 17-FEB-14
When using PRM in ASM of ASMLIB?
Simple and Clear: asmlib related ASM DISK is stored in OS as ll /dev/oracleasm/disks.
For example: Add files of /dev/oracleasm/disks into PRM ASM DISK
$ll /dev/oracleasm/disks
total 0
brw-rw---- 1 oracle dba 8, 97 Apr 28 15:20 VOL001

CASE 7: DB(stored in ASM) can not be opened
One of CRM database in company D can’t be opened due to adding disk which has I/O
error into ASM diskgroup. This operation generated some corrupted block in datafile of
system tablespace, and user failed to open DB any more.
In the circumstance, we can use PRM ASM Diskgroup to clone all datafile out of ASM.
Or, user can also use “Dictionary Mode(ASM)” to recover data from this ASM
environment . Steps as below:
1. Recovery Wizard
2. Dictionary Mode(ASM)
3. Add ASM DISK (all ASM DISK in your recovery disks)
4. Click ASM analyze
5. Select suitable Endian
6. In ASM analyze, it lists all database file, or click “select all”
7. Click “load”, following steps are the same with case3

CASE 8: Recover Lost system tablespace in ASM
User D deleted system tablespace FILE#=1 datafile and user tablespace. This make
alter database open failed.
In this circumstance, user can use” Non-Dictionary Mode (ASM)” to recover data.
Steps as below:
1. Recovery Wizard
2. Non-Dictionary Mode (ASM)
3. Add necessary ASM Disk
4. Click ASM analyze
5. Select the suitable Endian and Character set. (Manually select character set due to
Non-Dictionary Mode)
6. Select all data file, or click “Select all”
7. Click “scan”, following steps are the same with Case 3

CASE 9: Recover DROP TABLESPACE Data
User D dropped a tablespace(“DROP TABLESAPCE INCLUDING CONTENTS”) by
mistake. They want to recover data resided in that tablespace, but there is no RMAN
backup.
Therefore, we can use PRM No-Dictionary mode to recover data. In this way, we can
extract most data. However, the data is not mapping to the dictionary. Users need to
manually recognize the table. Since it changed data dictionary by DROPPING TABLE and
deleted objects in OBJ$, we can not have the relationship between DATA_OBJECT_ID and
OBJECT_NAME. Below is the instruction of getting mapping.
select tablespace_name,segment_type,count(*) from dba_segments where
owner='PARNASSUSDATA' group by tablespace_name,segment_type;
TABLESPACE SEGMENT_TYPE COUNT(*)
---------- --------------- ----------
USERS TABLE 126
USERS INDEX 136

SQL> select count(*) from obj$;
COUNT(*)
----------
75698
SQL> select current_scn, systimestamp from v$database;
CURRENT_SCN
-----------
SYSTIMESTAMP
---------------------------------------------------------------------------
1895940
25-4 月 -14 09.18.00.628000 下午 +08:00
SQL> select file_name from dba_data_files where tablespace_name='USERS';
FILE_NAME
--------------------------------------------------------------------------------
H:¥PP¥MACLEAN¥ORADATA¥PARNASSUS¥DATAFILE¥O1_MF_USERS_9MNBMJYJ
_.DBF
SQL> drop tablespace users including contents;
C:¥Users¥maclean>dir
H:¥APP¥MACLEAN¥ORADATA¥PARNASSUS¥DATAFILE¥O1_MF_USERS_9MNBMJYJ
_.DBF
The volume is entertainment in drive H and SN is A87E-B792

H:¥APP¥MACLEAN¥ORADATA¥PARNASSUS¥DATAFILE
The drive can not find the file
Here, we can use other file recovery tool for data file recovery, for example: Undeleter on
Windows.
Startup PRM => recovery Wizard => No-Dictionary

This is No-Dictionary mode, and please select correct character set

Add the files recovered and click scan

Start from the head segments, if it can not find all table, try to use extend scan:

You can find lots of node named OBJXXXXX，this name is combination of “OBJ” and
DATA_OBJECT_ID. We need some guy who is familiar with schema design and
application data, he can clarify the relationship between data and table.

If there is no body can clarify the relationship between data and table, try below
methods:
In this case, only user tablespace had been dropped and Oracle still works, and to get the
mapping of DATA_OBJECT_ID and table name by FLASHBACK QUERY.
SQL> select count(*) from sys.obj$;
COUNT(*)
----------
75436

SQL> select count(*) from sys.obj$ as of scn 1895940;
select count(*) from sys.obj$ as of scn 1895940
*
Error:
ORA-01555: Snapshot is too old,
Try to use DBA_HIST_SQL_PLAN of AWR and find the mapping between OBJECT#
and OBJECT_NAME in recent 7 days.
SQL> desc DBA_HIST_SQL_PLAN
NAME NULL? TYPE
----------------------------------------- -------- -----------------------
DBID NOT NULL NUMBER
SQL_ID NOT NULL VARCHAR2(13)
PLAN_HASH_VALUE NOT NULL NUMBER
ID NOT NULL NUMBER
OPERATION VARCHAR2(30)
OPTIONS VARCHAR2(30)
OBJECT_NODE VARCHAR2(128)
OBJECT# NUMBER
OBJECT_OWNER VARCHAR2(30)
OBJECT_NAME VARCHAR2(31)
OBJECT_ALIAS VARCHAR2(65)
OBJECT_TYPE VARCHAR2(20)
OPTIMIZER VARCHAR2(20)
PARENT_ID NUMBER
DEPTH NUMBER
POSITION NUMBER
SEARCH_COLUMNS NUMBER
COST NUMBER
CARDINALITY NUMBER
BYTES NUMBER

OTHER_TAG VARCHAR2(35)
PARTITION_START VARCHAR2(64)
PARTITION_STOP VARCHAR2(64)
PARTITION_ID NUMBER
OTHER VARCHAR2(4000)
DISTRIBUTION VARCHAR2(20)
CPU_COST NUMBER
IO_COST NUMBER
TEMP_SPACE NUMBER
ACCESS_PREDICATES VARCHAR2(4000)
FILTER_PREDICATES VARCHAR2(4000)
PROJECTION VARCHAR2(4000)
TIME NUMBER
QBLOCK_NAME VARCHAR2(31)
REMARKS VARCHAR2(4000)
TIMESTAMP DATE
OTHER_XML CLOB
For exmaple：
select object_owner,object_name,object# from DBA_HIST_SQL_PLAN where
sql_id='avwjc02vb10j4'
OBJECT_OWNER OBJECT_NAME
OBJECT#
-------------------- ---------------------------------------- ----------
PARNASSUSDATA TORDERDETAIL_HIS
78688
Use below scrip for the mapping relationship between OBJECT_ID and
OBJECT_NAME

Select * from
(select object_name,object# from DBA_HIST_SQL_PLAN
UNION select object_name,object# from GV$SQL_PLAN) V1 where V1.OBJECT# IS
NOT NULL minus select name,obj# from sys.obj$;
select obj#,dataobj#, object_name from WRH$_SEG_STAT_OBJ where object_name
not in (select name from sys.obJ$) order by object_name desc;
another script：
SELECT tab1.SQL_ID,
current_obj#,
tab2.sql_text
FROM DBA_HIST_ACTIVE_SESS_HISTORY tab1,
dba_hist_sqltext tab2
WHERE tab1.current_obj# NOT IN
(SELECT obj# FROM sys.obj$
)
AND current_obj#!=-1
AND tab1.sql_id =tab2.sql_id(+);
Attention: Since it relies on AWR repository, the mapping table is not that accurate and
exact.

CASE 10: Recover Data after Dropping Table by
mistake.
User D dropped one most important application table in ASM without any backup.
Oracle introduced recyclebin feature in 10g. Please check whether the dropped table is in
recyclebin by DBA_RECYCLEBINS view. If there is , try to recover data back by “flashback
to before drop”. Or, we can use PRM for recovery.
Recovery steps by PRM
1. OFFLINE the table space that the dropped table locates.
2. Find the DATA_OBJECT_ID of dropped table by query data dictionary or logminer.
If not successfully, then user has to recognize this table in No-dictionary mode.
3. Start PRM, go to No-dictionary mode, and add all data files of dropped data file.
Then SCAN DATABASE+SCAN TABLE from Extent MAP
4. Locate the data table by DATA_OBJECT_ID in object tress, and insert data back by
DataBridge
SQL> select count(*) from "MACLEAN"."TORDERDETAIL_HIS";
COUNT(*)
----------
984359
SQL>
SQL> create table maclean.TORDERDETAIL_HIS1 as select * from
maclean.TORDERDETAIL_HIS;
Table created.
SQL> drop table maclean.TORDERDETAIL_HIS;

Table dropped.
We can find the general DATA_OBJECT_ID by logminer or similar method in “CASE 9”
EXECUTE DBMS_LOGMNR.ADD_LOGFILE( LOGFILENAME => '/oracle/logs/log1.f',
OPTIONS => DBMS_LOGMNR.NEW);
EXECUTE DBMS_LOGMNR.ADD_LOGFILE( LOGFILENAME => '/oracle/logs/log2.f',
OPTIONS => DBMS_LOGMNR.ADDFILE);
Execute
DBMS_LOGMNR.START_LOGMNR(DBMS_LOGMNR.DICT_FROM_ONLINE_CATALO
G+DBMS_LOGMNR.COMMITTED_DATA_ONLY);
SELECT * FROM V$LOGMNR_CONTENTS ;
EXECUTE DBMS_LOGMNR.END_LOGMNR;
Although, there is no DATA_OBJECT_ID, if the table amount is not big, we can
manually recognize the data table
OFFLINE table space of dropped table
SQL> select tablespace_name from dba_segments where segment_name='TPAYMENT';
TABLESPACE_NAME
------------------------------
USERS
SQL> select file_name from dba_data_files where tablespace_name='USERS';
FILE_NAME

----------------------------------------------------------------
+DATA1/parnassus/datafile/users.263.843694795
SQL> alter tablespace users offline;
Tablespace altered.
Start PRM in NON-DICT mode, and add all data to SCAN DATABASE+SCAN TABLE
From Extents:

Add related ASM Disks and click ASM Analyze

Select the character set in Non-Dict mode
Select the data files of dropped table, and click scan

Generate database name and right click scan tables from extents:

Recognize TORDERDETAIL_HIS table which is mapped to DATA_OBJECT_ID=82641
manually and insert back to the database by DataBridge

FAQ
1. How to get database character set?
You can find your database character by Oracle Alert.log
[oracle@mlab2 trace]$ grep -i character alert_Parnassus.log
Database Characterset is US7ASCII
Database Characterset is US7ASCII
alter database character set INTERNAL_CONVERT AL32UTF8
Updating character set in controlfile to AL32UTF8
Synchronizing connection with database character set information
Refreshing type attributes with new character set information
Completed: alter database character set INTERNAL_CONVERT AL32UTF8
alter database national character set INTERNAL_CONVERT UTF8
Completed: alter database national character set INTERNAL_CONVERT UTF8
Database Characterset is AL32UTF8
2. PRM failed with GC ” gc warning: Repeated allocation of very large block (appr.size
512000)”
So far, most of problem is caused by not recommended Java environment. Especially, on
Linux, default java environment is redhat gcj java. ParnassusData suggest Open JDK 1.6 for
PRM, and use $JAVA_HOME/bin/java –jar prm.jar for PRM boot.
Open JDK For Linux download Link:
Open jdk x86_64 for Linux 5 http://pan.baidu.com/s/1qWO740O
Tzdata-java x86_64 for Linux 5 http://pan.baidu.com/s/1gdeiF6r
Open jdk x86_64 for Linux 6 http://pan.baidu.com/s/1mg0thXm
Open jdk x86_64 for Linux 6 http://pan.baidu.com/s/1sjQ7vjf
Open jdk x86 for Linux 5 http://pan.baidu.com/s/1kT1Hey7
Tzdata-java x86 for Linux 5 http://pan.baidu.com/s/1kT9iBAn
Open jdk x86 for Linux 6 http://pan.baidu.com/s/1sjQ7vjf

Tzdata-java x86 for Linux 6 http://pan.baidu.com/s/1kTE8u8n
JDK on Other platform downloads:
AIX JAVA SDK 7 http://pan.baidu.com/s/1i3JvAlv
JDK Windows x86 http://pan.baidu.com/s/1qW38LhM
JDK Windows x86-64 http://pan.baidu.com/s/1qWDcoOk
Solaris JDK 7 x86-64bit http://pan.baidu.com/s/1gdzgSvh
Solaris JDK 7 x86-32bit http://pan.baidu.com/s/1mgjxFlQ
Solaris JDK 7 Sparc http://pan.baidu.com/s/1pJjX3Ft
Oracle JDK downloads:
http://www.oracle.com/technetwork/java/javasebusiness/downloads/java-archive-d
ownloads-javase6-419409.html#jdk-6u45-oth-JPR
3. If you find PRM bug, how to report bug to ParnassusData?
ParnassusData recommend anyone to report bug, just send
report_bugs@parnassusdata.com. Suggest submit bug environment, including Java
environment and Oracle database Environment.
4. What should I do if it PRM failed with
Error: no `server' JVM at `D:Program Files
(x86)Javajre1.5.0_22binserverjvm.dll'.
If user just installed JAVA Runtime Environment JRE, no JDK, please start PRM without
–server option. This option does not exist in the version before JRE 1.5, and there is
supposed to have an error.
ParnassusData suggests Open JDK 1.6 or above
Below link to download JDK 1.6
http://www.oracle.com/technetwork/java/javasebusiness/downloads/java-archive-d
ownloads-javase6-419409.html#jdk-6u45-oth-JPR
5. Why does PRM display Chinese as messy code?
So far, there are two reasons for Chinese encoding problem:

 The OS does not have Chinese language pack, PRM can not display Chinese
correctly
 If OS have language package installed, please use Open JDK1.6 or above. There
might be some problem in JDK1.4
6. Is there any forum for PRM?
Now we have Chinese forum for PRM, below is the link:
http://t.askmaclean.com/forum-24-1.html
Find More
Resource: http://www.parnassusdata.com/resources/
Technical Support: service@parnassusdata.com
Sales: sales@parnassusdata.com
Download Software: http://www.parnassusdata.com/
Contact: http://www.parnassusdata.com/zh-hans/contact
Conclusion
ParnassusData Corporation, Shanghai, GaoPing Road No. 733 . China
Phone: (+86) 13764045638
ParnassusData.com
Facebook: http://www.facebook.com/parnassusData
Twitter: http://twitter.com/ParnassusData
Weibo: http://weibo.com/parnassusdata

Copyright©2013, ParnassusData and/or its affiliates. All rights reserved. This document
is provided for information purposes only and the contents hereof are subject to change
without notice. This document is not warranted to be error-free, nor subject to any other
warranties or conditions, whether expressed orally or implied in law, including implied
warranties and conditions of merchantability or fitness for a particular purpose. We
specifically disclaim any liability with respect to this document and no contractual
obligations are formed either directly or indirectly by this document. This document may
not be reproduced or transmitted in any form or by any means, electronic or mechanical,
for any purpose, without our prior written permission.
Oracle and Java are registered trademarks of Oracle and/or its affiliates. Other names
may be trademarks of their respective owners.
AMD, Opteron, the AMD logo, and the AMD Opteron logo are trademarks or registered
trademarks of Advanced Micro Devices. Intel and Intel Xeon are trademarks or registered
trademarks of Intel Corporation. All SPARC trademarks are used under license and are
trademarks or registered trademarks of SPARC International, Inc. UNIX is a registered
trademark licensed through X/Open Company, Ltd. 0410
Copyright © 2014 ParnassusData Corporation. All Rights Reserved.

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