Diff between logical and physical block corruption

What is the difference between Physical and Logical block corruption.
Dbverify utility, analyze command is used to check the logical block corruption not the physical one am i correct??
When i get
ORA-01578: ORACLE data block corrupted (file # 9, block # 13)
ORA-01110: data file 9: '/oracle/dbs/tbs_91.f'
ORA-01578: ORACLE data block corrupted (file # 2, block # 19)
ORA-01110: data file 2: '/oracle/dbs/tbs_21.f'
How to conform that this a logical or physical block corruption???
please through some light regarding this....
kumaresh

the following link may help u
http://download-east.oracle.com/docs/cd/B19306_01/backup.102/b14191/rcmconc1012.htm

Similar Messages

Diff between logical and physical file path

Hi ,
Could you please explain difference between logical and physical file path's and their importance in ABAP.
Thanks and regards,
shyla

Hi
The function module FILE_GET_NAME convert a logical path into its corresponding physical path.
The advantage of using logical pathes within your applications is obivous:
If you need to change the physical path you just adjust it within transaction FILE yet no changes are required to your application.
http://help.sap.com/saphelp_erp2005vp/helpdata/en/25/ab3a57df3b11d189fc0000e829fbbd/frameset.htm
The file names that you use in ABAP statements for processing files are physical names. This means that they must be syntactically correct filenames for the operating system under which your R/3 System is running. Once you have created a file from an ABAP program with a particular name and path, you can find the same file using the same name and path at operating system level.
Since the naming conventions for files and paths differ from operating system to operating system, ABAP programs are only portable from one operating system to another if you use the tools described below.
To make programs portable, the R/3 System has a concept of logical filenames and paths. These are linked to physical files and paths. The links are created in special tables, which you can maintain according to your own requirements. In an ABAP program, you can then use the function module FILE_GET_NAME to generate a physical filename from a logical one.
Maintaining platform-independent filenames is part of Customizing. For a full description, choose Tools ® Business Engineer ® Customizing, followed by
Implement. projects ® SAP Reference IMG. On the next screen, choose Basis Components System Administration ® Platform-independent File Names.
For a more detailed description of the function module FILE_GET_NAME, enter its name on the initial screen of the Function Builder and choose Goto Documentation. On the next screen, choose Function module doc.
Another way of maintaining platform-independent filenames is to use the Transaction FILE. The following sections provide an overview of the transaction.
To create a logical filename, choose Logical filename definition, client-independent from the Navigation group box in Transaction FILE, then choose New entries. You define logical filenames
You can either define a logical filename and link it to a logical path (as displayed here), or you can enter the full physical filename in the Physical file field. In the latter case, the logical filename is only valid for one operating system. The rules for entering the complete physical filename are the same as for the definition of the physical path for the logical file. To display further information and a list of reserved words, choose Help.
If you link a logical path to a logical file, the logical file is valid for all syntax groups that have been maintained for that logical path. The filename specified under Physical file replaces the reserved word in the physical paths that are assigned to the logical path. To make the name independent of the operating system, use names that begin with a letter, contain up to 8 letters, and do not contain special characters.
Save your changes.

Diff between logical and physical page ?

hi
what exactly difference between logical and physical pages?
where to set page size in report designer?
after seting paper size in report designer can i readjust in print dialogue box?
which is will be effected?
please explain

A logical page can contain several physical pages. Assume you want to create a format which is larger then your printer is able to print, then you can define a logical size, which contains n pages horizontally and m pages vertically.
To set the page size for your report have a look at the properties in the main section of your paper layout.
Regards
Rainer

Difference between logical and physical SQL

Hi all,
I created a dashboard prompt and added some columns from the dimensions and one column from the fact table.
When I run the report in the dashboard and filters using the prompts,I see in the logical sql that all the filters have been applied to the report, but when I check the physical SQL only the filters on the dimensions columns have been applied.
I don't see the filter on the columns from the fact table.
Is there any reason for that?
Regards

I could figure out what was the issue.
My fact table was using a different MV as source table.The fact table column I was using in the prompt was not mapped correctly to the one in the MV.
Regards

Diff logical and physical doc

Hello BW Experts,
What is the difference between the logical and physical documents.
Thanks,
BWer

hi BWer,
take a look
http://help.sap.com/saphelp_nw2004s/helpdata/en/4e/668867df6a5c4591a4dc46631f5cc3/frameset.htm
http://help.sap.com/saphelp_nw2004s/helpdata/en/6c/69bd22418d11d1896e0000e8322d00/frameset.htm
hope this helps.

How to respond to physical block corruption??

Hi, all.
As far as I know, there are two types of block corruption.
1. logical block corruption
2. physical block corruption
In case of logical block corruption, there are a few method of how to take care of it.
such as BMR with rman, media recovery, and dbms package.
In case of physical block corruption, how can I respond to this type of errors?
Does physical block corruption of a disk mean disk failure??
If so, I have to replace the disk? Or, is there any other way to solve
this type of errors?
In addition, how can I know that the block corruption is caused by logical problems
or physical problems??
Thanks and Regards.

> In case of physical block corruption, how can I respond to this type of
errors?
Round around in circles, screaming at the top of your voice "we're all going to die!".
Hey, why that funny looks? It works. And it scares the stuffings out of management and colleagues... ;-)
> Does physical block corruption of a disk mean disk failure??
If by physical corruption you mean that reading a data block results in I/O errors and a corrupt/incomplete read buffer, then yes. The "disk" is failing - or more correctly, the I/O h/w is failing. It may not be the disk itself. It could be a problem with the HBA, a controller card, etc.
In exceptional cases it may not even be a h/w issue. It could be a s/w induced error. I once got physical I/O errors reported by Oracle. The problem was traced to an incompatibility between the ASMlib kernel module and EMC Powerpath. The SAN disks & h/w were fine.
> If so, I have to replace the disk? Or, is there any other way to solve
this type of errors?
There should be some kind of diagnostics you can run on the disks to determine if they are failing. Simply replacing a disk because there seems to be a physical corruption problem may not solve the problem itself.
You need to identify the actual problem. Which means looking at all Oracle traces/dumps in this regard, looking at the kernel logs, manually dumping blocks to see the results, using whatever I/O & disk diagnostic tools available, etc.
> In addition, how can I know that the block corruption is caused by logical
problems or physical problems??
That depends on what you define as logical and physical corruption. The latter means to me that I cannot get the data off the disk without some kind of I/O error. Logical means that the data can be read just fine, but is garbage. Which could simply mean GIGO without implying any kind of underlaying h/w failure.

Difference between logical and virtual terms

Hello,
This is not purely oracle question; but in documentation so many times we find 2 terms:
A. Logical
B.Virtual.
So what is the principle difference between logical and virtual? As I know physical is that which I can see and touch; while logical/virtual is that is imaginary. We say tablespace is logical not virtual; while Java Virtual Machine; not Java Logical Machine. So I want to know; what is the principle difference; why two words for an imaginary thing. Before posting question; I searched in google as “Difference between virtual and logical” but I couldn’t found the answer.
Please quote your comments.
Thanks & Kind Regards
Girish Sharma

Girish,
I wont say that I am correcting you as this is like that half glass full/empty thing.May be what I see is half empty , you would see the same as half full.
Well now coming to the explanation.I am saying honestly , I got more confused after reading your definitions.What do you mean by saing that tablespace is not virtual.I see it as purely virtual.We don't say it as virtual tablespace or logical tablespace but it is actualy logical/virtual, having no existance but just the definition right?
How can you say that the size of virtual is larger than logcial?The size of tablespace is actualy the sum total of size of datafiles.So it actualy becomes very larger right?Much larger than JVM which is of few megs only.
The point 3 totally knocked me out.I have no idea what you said.
Ok I tell you this.Just remember the definition that Hans gave already.If you ask me than its the best definition that we can have. Just remember this and if some one asks you more further than give them your point 3 definition and tell them understand this ;-).Please don'tmind I am just kidding. Its just semantics.Don't get lost into it.You will find many people using both the terms interchangibly. So its ok.I shall stick with Hans's defintion,simple and concise.There are lot more other topics to dig upon in oracle.I can mail you lots of them.Spend time on those.Don't think that I am demotivating you.I understand you asked only because you have a doubt.But we got a good resolution of it and beyond that, its not of much use to dig it atleast not in the technial terms.
Cheers
Aman....
PS:Are you on oraclecommunity.net?

Importing logical and physical model from Sybase power designer/Erwin

Hello,
We have several models created in Sybase Power designer, logical and as a well as physical. Is there a way to directly import models into Oracle designer?
Thank you for your help.
Syed

Hi Syed,
ERwin has a facility to export to Designer 2000. Of course you're probably not using Designer 6.0 or earlier so it's of little use.
I have been looking at a couple of tools for importing from ERwin: Reischmann Informatiks TOOLBUS Interface for Oracle Designer and ALLFusion ERwin; and Meta Integration Technologys Meta Integration Model Bridge (MIMB). Neither product is free (nor inexpensive) but if you've got a number of models to convert then the tools seem cheap by comparison. Also, none of the products that I've looked at recreate the actual diagrams (not that I expected them to).
I am leaning towards TOOLBUS as it provides more complete migration of Logical and Physical models (especially the linkages between the models) using Oracle Designers API rather than a DAT file as provided by MIMB.
Hope this helps,
Wayne Lehman
Avanti Business Systems Inc.

Can I check whole DB for logical and physical consistency?

Assume I get somehow the impression that a part of a DB is somehow corrupted.
E.g. due to hard disc sector errors or logical reference errors/changed foreign key values.
How can I tell Oracle DB to check itself resp. to verify all the content inside for logical and physical integrity?
Peter

Use DBVerify to check corruption in the datafiles.
Asif Momen
http://momendba.blogspot.com

Whats the diff between express and pro??

Just wondering what the main diff between the two are. I've used pro at school, but cant afford to get it at home. Will i still be able to use the same audio instruments like the same synths and plug ins??? Also, would i be able to run the program on a mac mini (top of the line)?

Matt Mac 63, "Whats the diff between express and pro??" #5, 10:33pm Oct 18, 2005 CDT
All I was saying is that if a person can afford to get Pro, they definitely should. The difference in features adds up to at least the difference in price, if not very much more.
Having said that, Express is good value compared to most other DAW software at that pricepoint, but it is only intended as a 'Lite' version.
Some examples, off the top of my head, of differences not made really clear in the comparison list.
Input Objects:
In Pro you can use Input Objects to monitor incoming signal without rec-enabling a track. That doesn't sound much, on the face of it, but what it means is you can use external FX units (hardware) as inserts in tracks (or busses) just like plugins, and bounce them with the mix. it also means you acn monitor what you are playing into Logic Pro with plugin FX applied, but record dry so you can hear your guitar with the reverb, or whatever, but still have the recorded dry signal so you can change the FX settings later.
Pro has some very handy environment objects. The main one being the Trabsformer object. But also another extremely useful object is TouchTracks.
If you've ever played with Ableton Live you would have noticed you can triger clips with the keyboard in all different ways (loop, gate loop, one shot etc.) Well TouchTracks does that with MIDI regions.(I have a feeling that feature in Live was modeled after Logic's TouchTracks' as it is incredibly similar.)
They are only a few examples of a whole range of differences. If all the differences were itemized in the 'comparison chart' it would be about 3 pages long.
All I am saying is, don't take the comparison chart as the definitive list of differences.
yes, Express is a good basic tool and you can do a lot with it, with some imagination.
The SOS author's claim that:
you're paying less than a third of the price of Logic Pro and getting over 90 percent of the functionality."
is not true in totality.
It may be true to someone who has never dabbled in audio software before, because it takes literally years to become fully conversant with every function in Logic Pro, and no-one uses absolutely everything.
But for serious users, who have big demands, in my opinion, Express is less than 30% of Pro's functionality.

What is a Logical and Physical file path in sap?

what is a Logical and Physical file path in sap?

Hi,
Physical file is what you see from the OS level.
Logical file is what ABAP code can call certain functions to read/write.
Transaction FILE would link them together. Typically the logical path ends with "<FILENAME>", and the logical file refers to the logical path.
To extract the physical path from the logical path name
DATA: lf_mandt TYPE sy-mandt,
        lf_opsys TYPE sy-opsys.
lf_mandt = sy-mandt.
lf_opsys = sy-opsys.
To extract the physical path from the logical path name
CALL FUNCTION 'FILE_GET_NAME'
    EXPORTING
      client           = lf_mandt
      logical_filename = p_unix
      operating_system = lf_opsys
    IMPORTING
      file_name        = gwa_input
    EXCEPTIONS
      file_not_found   = 1
      OTHERS           = 2.
IF sy-subrc EQ 0.
Concatenating the physical path and the input unix file name
    CONCATENATE gwa_input p_file INTO gf_file .
ENDIF.
Reward if helpful.
Regards,
Ramya

Logical and physical clear in ASO

Hi There,
I found one statement for Logical and physical clear in essbase dbag
The process for logically clearing data completes in a length of time that is proportional to
the size of the data being cleared.
The process for physically clearing data completes in a length of time proportional to the
size of the input data, not to the size of the data being cleared
What does size of the input data actually means? How it is different from data being cleared.
Thanks.

What is interesting with these statements is based on them, you would think a logical clear would be slower than a physical clear. In reality, it is vastly faster. I took a 30 minute physical clear down to about 40 seconds with a logical clear. Logical clers create offsetting entries from the main cube in a slice to produce a result whila a physical clear deletes the actual data. The one thing about logical clears is rather than have #missing for cleared intersections you get zeros

Logical and physical file paths

Hi,
can anyone elobrate me on what are logical and physical file
paths ?

hi,
Follow this link
http://help.sap.com/saphelp_nw04/helpdata/en/fc/eb3deb358411d1829f0000e829fbfe/frameset.htm
File format determination (Required / optional fields and field checks).
Logical File Path configuration through transaction 'FILE'. A new physical file path should be created on operating system level or an existing one can be used if agreed. The Basis team member should create a new file path at operating system level, if required.
Hope this helps, Do reward.

Issueduring verifying logical and physical dependencies of tablespaces.

I am facing below issue with Transportable Tablespace during verifying logical and physical dependencies of two tablespaces.
Oracle 10.2.0.2.0
RHEL 5
[oracle@prolinoradb1 ~]$ export ORACLE_SID=prodb136
[oracle@prolinoradb1 ~]$ sqlplus /nolog
SQL*Plus: Release 10.2.0.2.0 - Production on Sat Oct 7 07:46:07 2006
Copyright (c) 1982, 2005, Oracle. All Rights Reserved.
SQL> connect / as sysdba
Connected.
SQL> exec DBMS_TTS.TRANSPORT_SET_CHECK('USER_DATA_TBS,USER_NDX_TBS',TRUE);
BEGIN DBMS_TTS.TRANSPORT_SET_CHECK('USER_DATA_TBS,USER_NDX_TBS',TRUE); END;
ERROR at line 1:
ORA-01001: invalid cursor
ORA-06512: at "SYS.DBMS_SYS_SQL", line 899
ORA-06512: at "SYS.DBMS_SQL", line 19
ORA-06512: at "SYS.DBMS_TTS", line 838
ORA-04063: view "SYS.DBA_XML_TABLES" has errors
ORA-06512: at "SYS.DBMS_TTS", line 867
ORA-06512: at line 1
SQL>
I think some data dictionary script like catpatch.sql need to be run to resolve this issue but i didn't try it.
Plz share your thoughts..
Thnx

Here i face another issue relates to transporting tablespace.
I moved the datafiles from source db to target database (AIX 5.3 ->Windows 2003)
Now when i tried to convert the datafile endianness to windows failing with below error...
RMAN> CONVERT DATAFILE
2> 'C:\tmpdir\tmpdir\tw_01.dbf',
3> 'C:\tmpdir\tmpdir\tw_02.dbf',
4> 'C:\tmpdir\tmpdir\tw_03.dbf',
5> 'C:\tmpdir\tmpdir\tw_04.dbf',
6> 'C:\tmpdir\tmpdir\tw_05.dbf',
7> 'C:\tmpdir\tmpdir\tw_06.dbf'
8> TO PLATFORM="Microsoft Windows IA (32-bit)"
9> FROM PLATFORM="AIX-Based Systems (64-bit)"
10> DB_FILE_NAME_CONVERT=
11> "C:\tmpdir\tmpdir\", "E:\oracle\product\10.1.0\oradata\orcl\"
12> PARALLELISM=5;
Starting backup at 24-JUN-08
using channel ORA_DISK_1
using channel ORA_DISK_2
using channel ORA_DISK_3
using channel ORA_DISK_4
using channel ORA_DISK_5
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of backup command at 06/24/2008 17:19:27
ORA-06502: PL/SQL: numeric or value error: character string buffer too small
Any idea?
Source database is 10.1.0.3.0 and target database is 10.1.0.2.0. Does it matter?
Message was edited by:
GK Joe

Logical and Physical Standby on same Node

Is it possible to have a logical and physical standby database for a primary database on the same node (i.e. primary on NodeA, logical and physical database of primary on NodeB)?
Will there be any conflicts with data guard broker with this configuration or any problems I may encounter?

From a technical point of view this is possible. Your standby node should be powerful enough to handle 2 instances. For even higher availability 3 dedicated nodes would be better. When Node B is down, both physical and logical standby are also down.
Werner

Diff between logical and physical block corruption

Similar Messages

Maybe you are looking for