Recover A Corrupted LDF File
Jul 20, 2005
Recently, one of our database's mdf and ldf was corrupted. We were able to
bring back the database with the capability of importing and querying the
data. However, the data is not the full list. Some of the data are still
missing because the tables we want still has sone 'chain mis linkage' error
when we did a DBCC checkdb/checktable. DBCC couldn't fix those errors
either. We're pretty sure that there are some data still burry under the
corruption. Then we thought of the life LDF file. This file should have
recorded every transaction up to the point of failure. So we trying to
recover that file, but there are 2 problems. First is we don't have back up
of that file and 2nd, that file is also corrupted. I couldn't backup the
corrupted ldf file at its current state. It's giving me some unrelated error
message like disk space is out. All I know now is the only hope to recover
those missing data are in this LDF file. We tried to use this software from
Limingent Log Explorer to recover it. So far no such luck with that. So
I'm asking anyone who has similar experience or problem. Please let me know.
I need to know anyway to recover this LDF file, either by using sql server's
native tools or 3rd party tools. Any input is helpfull. thanks in advance.
Wei
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Nov 28, 2014
I run MSDE on a Windows XP Server and my database was marked as "suspect" by Enterprise Manager and its icon become gray. I detach that database and try to re-attach it but there is an error as the following:
Error 3624:
Location : page.cpp:2801
Expression: rowLength >= offset + deleteLenght
SPID : 56
Precess ID:1612
After that, I uninstall the MSDE and re-install new MSDE SP4 and try to re-attach the database file again and there is still an error. Is there anyway i can recover the data from that database?
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Jul 23, 2005
Hello,I am trying to recover a SQL Server 7 database from another hard diskdrive that has a corrupted Windows 2000 Advanced Server installation. Iam not able to repair the corrupted Windows 2000 Advanced Serverinstallation but the file system is intact. I have installed a new copyof SQL Server 7 onto a new hard disk and have used the sp_attach_dbsystem stored procedure to attach the database from the old hard driveinto the new installation of SQL Server 7 on the new hard drive. Thedatabase shows up in the Enterprise Manager View and all the data andstructure are there, but when I try to run a Web site that uses ODBCconnections to the database I get the following error:ODBC Error Code = 08001 (Unable to connect to data source)[Microsoft][ODBC SQL Server Driver][Named Pipes]Specified SQL servernot found.I have double-checked that all the NTFS permissions, ODBC DSNs, and WebServer settings are correct and when I run the SQL Server ODBC drivertest at the completion of each ODBC DSN setup, it is successfull.1) Why am I getting this ODBC error?2) What steps have I missed in the recovery process?3) If I have done something wrong recovering my database, can I stillrecover it since I still have: a) The old master database file and logfile; b) The old database (non-master) file and log file; c)A backed-up(Enterprise Manager -> Right Click A Database -> All Tasks -> BackupDatabase) copy of the old database (non-master) file; ?My System Specifications:-Windows 2000 Advanced Server-SQL Server 7-IIS 5.0-Cold Fusion Server 4.5 Professional Full EditionThanks For Your Time,Nathan
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Nov 14, 2007
We have one database of 5 GB of which when we take the backup and restore in another location, it says "Device Activation Error. The Physical file name e:databaseike_log.ldf may be incorrect".
The database has more than one log file.
Now when we use another procedure to create new database and stop the sql, then replace the old mdf file and REBUILDLOG. (Ie dbcc rebuildlog(nike,1,0)). It says incorrect DBCC Statment.
Pl. suggest us what to do?
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Jul 20, 2005
Need to recover from a corrupted log file. The database in EnterpriseManager shows the database as corrupt.Using sp_Attach_db produces a corrupt log message.Any way to recover the data?Thanks
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Nov 1, 2007
hello,
i am using sql server ce 2.0 on windows ce 4.2.sometimes my sdf file gets corrupted but i cant understand why?i know how this file repair.but for me it is not a solution.please somebody help me!
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Mar 16, 2006
ok..my friend sent me a video via file transfer, but when i tried to view it, and open it up with windows movie maker (that is the program she made the video on) it said the file was corrupted. is there any way i can fix the corrupted file? or any other program i can view it on? windows media player also declares it corrupted.
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Apr 3, 2008
Hi This is chetan jain sql server DBA.
I came accross a probplem while synchronising production with DR in logshipping.
logshipping was stopped and the message was " Cannot copy the ......TRN . file is corrupted.
can anybody suggest that what should be done if TRN file is corrupted...because if i manully restore the logs at DR i will need every log file to sync Prod with Dr.log file that is corrupted cannot be skipped...neither it can be restored at Dr.
please suggest the solution..
Thanks in Advance...
Thanks in advance.
-- Chetan
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Nov 10, 2007
hi,
i developed an application which running on PDAs.i am using sqlserver ce database.my database file sometimes corrupted,why sqlce databases are corrupted and what can i do not corrupted.i can repair my database file when it corrupted but my customers not understand when database file was corrupted,so they think that program doesnot work.
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Jun 7, 2007
hello i have this problem if anyone can help
EXEC sp_attach_single_file_db @dbname = 'world',
@physname = 'C:Program FilesMicrosoft SQL ServerMSSQL.1MSSQLDataworld.mdf'
Msg 1813, Level 16, State 2, Line 1
Could not open new database 'world'. CREATE DATABASE is aborted.
Msg 3456, Level 21, State 1, Line 1
Could not redo log record (9767813:109:10), for transaction ID (1:1182802845), on page (1:27846), database 'world' (database ID 5). Page: LSN = (9767810:70:66), type = 2. Log: OpCode = 3, context 19, PrevPageLSN: (9767812:47:11). Restore from a backup of the database, or repair the database.
Msg 3313, Level 21, State 2, Line 1
During redoing of a logged operation in database 'world', an error occurred at log record ID (9767813:109:10). Typically, the specific failure is previously logged as an error in the Windows Event Log service. Restore the database from a full backup, or repair the database.
thanks
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Aug 6, 2015
I want to know is there any process alert me that my data or .ldf file get corrupted?
I've been going through data corruption from last 2 days in row that .ldf getting corrupted and I've to fix it.
Is there anyway I can setup any alert? or any better procedure ?
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Jul 21, 2014
our sql server databases are on a window cluster server.how to correct this issue or why would this happen? FILESTREAM data container 'M:TessituraDB DataDocuments' is corrupted. Database cannot recover.
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Aug 7, 2015
Log shipping was configured 6 months back. A Transaction log file got corrupted today. How to resolve this?
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May 9, 2007
A friend of mine called and said that his database was suspect and he detached it and was unable to attach it. The SQL Server Version is 2000 with the latest service packs installed. When I checked it the database (MDF) size was 1MB and the LDF size was 3.8 GB. I was not able to attach the two together and I was not able to attach the database using sp_attach_single_file_db. I did find an old backup of his database and attached that so he can work off of it but it is 1 yr old and he needs recent data. Since the MDF seemed to be blank we cant do much with that, but there seems to be data in the LDF. Is it possible to extract any data from the LDF file?
Sunny
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Apr 11, 2006
I use this code to get Tiff files from db , but output file seems to be corrupted :
Dim pubsConn As SqlConnection = New SqlConnection("Server=(local);uid=sa2;pwd=sony;database=pubs;") Dim logoCMD As SqlCommand = New SqlCommand("SELECT pub_id, logo FROM pub_info", pubsConn)
Dim fs As FileStream ' Writes the BLOB to a file (*.bmp). Dim bw As BinaryWriter ' Streams the binary data to the FileStream object.
Dim bufferSize As Integer = 100 ' The size of the BLOB buffer. Dim outbyte(bufferSize - 1) As Byte ' The BLOB byte() buffer to be filled by GetBytes. Dim retval As Long ' The bytes returned from GetBytes. Dim startIndex As Long = 0 ' The starting position in the BLOB output.
Dim pub_id As String = "" ' The publisher id to use in the file name.
' Open the connection and read data into the DataReader. pubsConn.Open() Dim myReader As SqlDataReader = logoCMD.ExecuteReader(CommandBehavior.SequentialAccess)
Do While myReader.Read() ' Get the publisher id, which must occur before getting the logo. pub_id = myReader.GetString(0) ' Create a file to hold the output. fs = New FileStream("\Server1shared1logo" & "KK" & ".tiff", FileMode.OpenOrCreate, FileAccess.Write) bw = New BinaryWriter(fs)
' Reset the starting byte for a new BLOB. startIndex = 0
' Read bytes into outbyte() and retain the number of bytes returned. retval = myReader.GetBytes(1, startIndex, outbyte, 0, bufferSize)
' Continue reading and writing while there are bytes beyond the size of the buffer. Do While retval = bufferSize bw.Write(outbyte) bw.Flush()
' Reposition the start index to the end of the last buffer and fill the buffer. startIndex += bufferSize retval = myReader.GetBytes(1, startIndex, outbyte, 0, bufferSize) Loop
' Write the remaining buffer. bw.Write(outbyte, 0, retval - 1) bw.Flush() ' Close the output file. bw.Close() fs.Close() Loop
' Close the reader and the connection. myReader.Close() pubsConn.Close()
Me.Div1.InnerHtml = ("<embed height=650 width=100% toolbar='' src= '" & "\Server1shared1logoKK.tiff" & "' type='application/x-alternatiff'>")
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Feb 8, 2012
I trying to update my Aggregation Design for a partition using BIDS Helper. The current aggregation design contains about 60 aggregations and the new aggregation I am trying to add is across 5 dimension attributes, the product of which is about 500,000 unique values. The fact table is about 13,000,000 rows.
When I deploy the aggregation and run ProcessIndex, I get the follow error:
File system error: The following file is corrupted: Physical file: ?E:Program FilesMicrosoft SQL ServerMSAS10_50.MSSQLSERVEROLAPDataTestDB.14.dbcube_2.607.cub
cubemeasuregroup_2.633.detDefaultPartition_2.579.prt852.agg.flex.data. Logical file.
If I remove the new aggregation, deploy, and run ProcessIndex again, it processes fine.
Is there some file size limitation I am running into? The agg.flex.data file is 7.8 GB before adding the new aggregation, so it isn't subject to the same 4 GB limit as .asstore.
Windows Server 2008 64 bit
SQL Server 2008 R2 (10.50.1746.0) 64 bit
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Jun 3, 2015
We have database when trying to make read only throwing below error: with stack dump
Location: recovery.cpp:4517
Expression: m_recoveryUnit->IsIntendedUpdateable ()
SPID: 51
Process ID: 6448
Msg 926, Level 14, State 1, Line 1
Database 'XXXX' cannot be opened. It has been marked SUSPECT by recovery.
See the SQL Server errorlog for more information.
Msg 5069, Level 16, State 1, Line 1
ALTER DATABASE statement failed.
Msg 3624, Level 20, State 1, Line 1
A system assertion check has failed. Check the SQL Server error log for details. Typically, an assertion failure is caused by a software bug or data corruption. To check for database corruption, consider running DBCC CHECKDB. If you agreed to send dumps to Microsoft during setup, a mini dump will be sent to Microsoft. An update might be available from Microsoft in the latest Service Pack or in a QFE from Technical Support.
Msg 3313, Level 21, State 2, Line 1
During redoing of a logged operation in database 'XXXX', an error occurred at log record ID (0:0:0). Typically, the specific failure is previously logged as an error in the Windows Event Log service. Restore the database from a full backup, or repair the database.
Msg 3414, Level 21, State 1, Line 1
An error occurred during recovery, preventing the database 'XXXX' (database ID 7) from restarting. Diagnose the recovery errors and fix them, or restore from a known good backup. If errors are not corrected or expected, contact Technical Support.
Investigation DONE:
- DBcc checkdb shown Clean
- database is online and able to access
-Detached database and attached with rebuild log, still could not bring database read_only
SQL version : SQL server 2008 SP4.
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Oct 9, 2007
yes,I have an error, like 'The database file may be corrupted. Run the repair utility to check the database file. [ Database name = SDMMC Storage Cardwinpos_2005WINPOS2005.sdf ]' .I develope a program for Pocket Pcs and this program's database sometimes corrupt.what can i do?please help me
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Aug 24, 2006
hi all,
i have SQL 2000 server with SP3, yesterday my database was suddenly goes to suspect mode. then i found log in sql server log. and it shows following text:
I/O error (bad page ID) detected during read at offset 0x00000000030000 in file 'C:Program FilesMicrosoft SQL ServerMSSQLDataMFS_Data.MDF'..
kindly, do needful for recover data from this file...
Tejas Kishanwala
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Oct 21, 2015
I am working on SQL Server 2008 R2 and unfortunately I have lost my .mdf file after detaching it from my database, but the .ldf is still in my system. Is there a way to recover my database from .ldf file?
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Jun 15, 2006
Hello!
Hopefully someone can help me with the following (potentially huge) problem:
We've got a simple database application running on microsoft sql desktop engine. This database contains two tables. Up until now all worked fine, but probably due to a programma that crashed part of the database seems to be corrupted or broken while today only one table contains/returns data and the other table does not return any values!
When I open the .ldf and .mdf files in notepad I see that there is data belonging to both the tables. But how do I recover it??
The max. size of the database has not been reached by far (it's only 9Mbs), the sql queries are correct.
This .ldf file is a log file (?) I can't find detailed info about the principles of these .ldf and .mdf files on the internet, is it possible to trace back what has happened en recover the database that way?
Thanks in advance.
Greetings,
Rens Voogd
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Aug 3, 2002
Hi All,
By mistake i delete database from sql server. Due to which the the mdf and ldf file of the datbase are removed from my system. Then i used file recover utility and retrived my mdf and ldf files.But now i am not able to attach those files into databse. These mdf and ldf files has been corrupted. Now how can i recover my data from those mdf and ldf files.Please answer me if you have any solution on this problem.
Regards,
Satish Rotella
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Jul 10, 2015
Recently i got task from Senior DBA, as : Recover a database without LOG file Currently Data File is available.
Log file is also available, but shows size as 0 KB. Means Log file is corrupted.
Currently existing DB is shown as Offline Mode in SSMS.
So i got below link:
[URL]
When i tried 1st/2nd solution from above link, i got below message:The log cannot be rebuilt because there were open transactions/users when the database was shutdown, no checkpoint occurred to the database, or the database was read-only. This error could occur if the transaction log file was manually deleted or lost due to a hardware or environment failure.
To try that 3rd solution, I had to DELETE/Remove existing DB from SSMS, so i can create New DB with same name.
When i tried to delete Log file from Command Prompt, using below command, Windows replied that File is corrupted, so it cannot be deleted.
DEL /F /Q /A C:Program FilesMicrosoft SQL ServerMSSQL11.SQLEXPRESS2012MSSQLDATAMyDB.ldf
Meanwhile my Senior DBA brought DB in Recovery Pending mode.
So if i want to go for 3rd solution,then i need to DELETE file, But Windows is not allowing me.
[URL]
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Jul 6, 2006
Dear All,SOS Please Help.I have a MS-SQL DB with 4 .ndf files. One (first) .ndf file is missing.somehow got deleted??. Is there any way can rebuild my DB.The .MDF and .LDF files are in tact.Please help asap.Dhumbak*** Sent via Developersdex http://www.developersdex.com ***
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Dec 22, 2006
Hi,
My database corrupted because when I was running an update query, there is a power failure. After the computer booted, I cannot open the database anymore, it just not responding. Then I stop the sql server service, and tried to rename the .mdf and .ldf. After that it worked normally, but I need the data from the corrupted mdf file, I tried to attach the database but it just hanged. I even tried to attach without the .ldf file but it didn't work either, so I concluded that the problem is with the mdf file.
Is there any way to recover my data ??
Thanks in advance
Regards,
Edwin
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Dec 23, 2003
Hi ,
I got problem in production server at client place(No backup copy & not replicated,it's a SQL SERVER 2000 Enterprise server),by mistake client updated the data without using where condition then updated lakhs of rows (in SQL server autocommited),Now I need to recover this data from LOG file(.ldf).I tried with LOG EXPLORER(Third party tool) Trail version recovered from default database(Northwind,Pubs).But client not willing purchase this S/W for simple cause,How can we recover the data from LOG file.
1.Can we write the Program in C# to read the SQL Server Log and show the past transactions?
2.Is There any Stored procedures exist in SQL Server to read the day transactions in log file and take the backup?
3. How to read Transactions Log file in SQL Server 2000?
It's very Urgent,I am not expert in SQL Server 2000.
Could U Please Help me with possible solutions.
Regards,
Harikrishna.
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Feb 24, 2002
Our SQL database log file got physically deleted. Now the database is in suspect mode. Is it possible to recover / restore the database just with the data file.
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Jun 3, 2015
SQL server. By-mistake I updated values of a column in a database hosted online, is there any way undo the transaction. I didn't created any backup of the database. I read that still it can be recoverd through the .ldf (log file) but unable to access it. Is there anyway to get access of the Log file or is there any way to recover the data.
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Nov 10, 2006
catcat writes "Hi All,
Our MSSQL 2000 server crashed yesterday and one database cannot be restored. the latest backup we have is june. We can only recover the MDF file from the harddisk and according to our admin, it cannot be restored anymore because no proper shutdown was made.
Will appreciate your help here."
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Jul 20, 2005
I have SQL server 2000 which recently crashed. I try to recover it andfound out that the Master database is corrupt. I never backup myserver using inline sql backup nor any third party backup program thataware to SQL server. But I have full system backup of volume c on tape(using NTBackup), which includes old version of Master database. Myquestions are:1. How can I recover this file into SQL server?2. If so, it is not risky to recover Master database from two weeksago?Thanks in advance!
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Nov 19, 2007
Hi,
The standby file (.tuf file) got deleted accidentally on the secondary. How can I recover the database without the standby file?
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Jul 31, 2007
Hi Everyone,
when i am trying to attach a 'xxx.mdf' file it is showing message 'xxx.mdf' is not a primary database file.
Please suggest me what could be the reasons and what are the possible ways to recover my database.
I have lot of important data in the database.
Thanks and Regards,
Shashidhar
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