Data corruption refers to errors in computer data that occur during writing, reading, storage, transmission, or processing, which introduce unintended changes to the original data

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mongod 2.6 corruption (Assertion failure isOk() src/mongo/db/storage/extent.h 80)

I have been using mongo 2.6.0 for some time on 64-bit centos (with journaling enabled). One fine day when we were testing to insert a document to one of the collections, we started seeing data ...
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PostgreSQL 9.4.4 Crashing

We are having 9.4.4 version running on linux( PostgreSQL 9.4.4 on x86_64-unknown-linux-gnu, compiled by gcc (GCC) 4.8.3 20140911 (Red Hat 4.8.3-9), 64-bit) which is crashing unexpectedly and coming ...
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37 views

Unable to load mysql dump file

I recently had to deal with migrating some servers over (rather was forced to by the hosting company) and we took too long to migrate our data so they did it for us. Unfortunately they just copied ...
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1answer
28 views

Postgres 9.2 - postgres - FATAL: XX000: relation mapping file “global/pg_filenode.map” contains incorrect checksum

We have a ~400GB Postgres database (v9.2.6) (running on CentOS 6.5) that had a problem with free space and with every command (ls, pwd etc) we were seeing a segmentation fault error. We were able to ...
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29 views

Oracle DB - DR corruption

One of my databases in my DR is fully corrupted ( I have checked running validate database using RMAN). Now to recover all the data files which are corrupted I need to copy the data files from my ...
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1answer
69 views

MySql Innodb corruption recovery

I have a MySql database, just containing Innodb tables, that seems to have corrupted itself. It replicates to another server and it has corrupted that one too! The symptom is that I can restart the ...
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1answer
33 views

Should database directory and file access be restricted to only the db user?

I don't know exactly how to word this question and I haven't been able to find any specifics on it so apologies if it's a duplicate. I know that it's standard practice to have database server ...
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52 views

MYSQL crashes on XAMPP while working with drupal

Good day, just today morning i was using drupal to add some content, it crashed and mysql shutdown unexpectedly at xampp!! last thing i was doing was inserting a data into a field with "auto complete ...
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42 views

Clipper / DBF error

I'm not able to open a Clipper application (the app is 15 years old) because I'm getting : error dbfntx/1012 corruption detected Is there anyway to fix corrupted dbf files besides restoring from the ...
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32 views

Dropping a corrupt table in innodb_force_recovery 6

As often happens in mysterious shutdowns during large queries, things ran afowl with InnoDB on my XAMPP MySQL installation (Windows 7 x64). I rebooted and ran Startup Repair, then loaded MySQL to ...
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106 views

how to prevent an oracle block corruption from duplicating a database with a few nologging tables

I got a few data corruptions in a test db when I performed a duplicate from a production db where a few tables have the nologging option. Oracle support suggested to turn on the force logging option ...
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117 views

Receiving error when running DBCC CheckDB - multiple IAM pages

Running DBCC CHECKDB (dbname) WITH NO_INFOMSGS, ALL_ERRORMSGS results in this error: Table error: Multiple IAM pages for object ID 813245952, index ID 1, partition ID 72057594073972736, ...
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69 views

Possible to restore a damaged database's PRIMARY filegroup only?

I have a database (MyDatabase) with 2 filegroups, [PRIMARY] and [SECONDARY]. The [SECONDARY] filegroup has 2 datafiles, [DataFileA] and [DataFileB]. [DataFileA] is damaged (even after DBCC CHECKDB ...
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1answer
63 views

Very weird Innodb Corruption Issue

I'll try to keep this to the point. System: OPenVZ VPS, debian 6, 512 MB RAM, 50 GB HDD (25GB free) I have a mysqldump dump file (3GB), that was created when the innodb database was working fine. ...
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660 views

CHECKDB found 2 allocation errors and 0 consistency errors not associated with any single object

Msg 8906, Level 16, State 1, Line 1 Page (1:99122) in database ID 9 is allocated in the SGAM (1:3) and PFS (1:97056), but was not allocated in any IAM. PFS flags 'MIXED_EXT ALLOCATED 0_PCT_FULL'. ...
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2answers
447 views

Detecting and fixing database corruption on SQL Server mirrored database

I’m new to my current company and we have a System Administrator but no DBA. In the past I’ve taken care of DBA related issues at other companies. I’ve run into and corrected database corruption in ...
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1answer
55 views

full windows server backup with database files but not backed up through sql server

I am new to this and I have been backing up a windows sbs2011 server each night doing a full backup. The sql files are included but not backed up using sql backup program. Now one of the database ...
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131 views

postgresql 9.3 with Ubuntu 14.04.1 LTS throw 's ERROR: invalid page in block 105 of relation base/16385/17407

This is Ubuntu 14.04.1 LTS with postgresql 9.3 in production, Now i got this below error's in log. # tail -f /var/log/postgresql/postgresql-9.3-main.log 2015-01-08 14:10:16 IST CONTEXT: automatic ...
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1answer
32 views

Will canceling InnoDB compression that's already in progress corrupt data?

I have a 155GB table that is in the process of being compressed. ALTER TABLE $table_name ROW_FORMAT=COMPRESSED KEY_BLOCK_SIZE=8; This compression has been running for a long time and is impeding my ...
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1answer
356 views

Corrupt DB for a noob

Please help me! I am not a DB admin, and I have been thrust into the role after taking a new job. I need as much step by step as you can give me... I've already done the dbcc ...
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268 views

How do I recover from MySQL InnoDB table/index corruption?

While trying to upgrade a database (in place) I got the following error. The server starts up and everything seems to be fine, except that the table mentioned in the message is no longer accessible. ...
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unable to bring database online from recovery pending

I am trying to bring a SQL Server database online and accessible that is in Recovery Pending state. The SQL Server service uses an Active directory account that is a domain administrator and a ...
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72 views

MS Access database corruption

I have been searching for an answer to this, but no luck. Has anyone ever seen the below error when loading an Access 2010 database? "[database name] has detected corruption in this file. To try to ...
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140 views

mysqldump with --single-transaction seems to be “fixing” InnoDB tables with page corruption - why?

I'm trying to find out what exactly is happening here. I've been intentionally corrupting index pages in InnoDB tables, changing bytes in user record areas that actually contain information (largest ...
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78 views

How to guard against backup corruption due to spurious bit errors?

There's always a very small chance that a backup that was just written to disk is corrupted. Disks are not 100% reliable. Bits can be flipped with very low probability. I have seen that happen on ...
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how to resolve mssqlsystemresource.mdf corruption?

Desperate for help, but fearing the worst here :( Something crashed SQLSERVER 2005 this afternoon approx 3pm. Since then I have been trying to get running again. Original log file messages told that ...
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3k views

SQL Server Database is corrupted

Unfortunately hard disk of my system is damaged, now I recovered my database. But it cannot be attached again to SQL management studio 2005. The error is: myfile.mdf is not a primary database file. ...
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85 views

How do I fix and prevent corrupted MySQL tables?

We have developed software that uses MySQL. After some months of usage, some of the database tables had been corrupted and need to be repaired. Because of the corruption,we are not able to create a ...
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1k views

How can I correct SQL Server Error 8928?

I received the following error message in an application running against one of my databases: SQL Server detected a logical consistency-based I/O error: incorrect checksum (expected: 0xfdff74c9; ...
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352 views

Database going to Suspect mode [closed]

I have a frequent problem, that is one of my databases goes to suspect mode. Many times I have recovered it with: ALTER DATABASE Your_Db SET EMERGENCY DBCC checkdb('Your_Db') ALTER DATABASE Your_Db ...
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293 views

Postgresql pgAdmin, count(*), max(pk_field) giving inconsistent results

I am running postgresql 9.3.4 on a Centos 6.5 server as a back end for a web app which I am currently load testing. Presently, if I visit the state table in pgAdmin, right click on "count", I get a ...
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181 views

Uploaded files corrupted except txt/csv

I have an ASP.NET MVC 4 Application with standard CRUD functionality plus a file Upload capability. Currently I am struggling with the files being corrupted after the download. I created a ...
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1answer
146 views

Checking records consistency after mongorestore --noobjcheck

I had an HDD malfunction on a Mongo node. After running fsck and mongod --repair I was able to dump the needed collection with mongodump and move it to another server. However, some records appear ...
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317 views

mysql Wrong bytesec: 0-0-0 at linkstart: 0

I have several MySQL (MyISAM) tables that have been corrupted. Running CHECK TABLE mytable returns: > +-----------------+-------+----------+----------------------------------- | > ...
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Corrupted Filesystem: Possible to restore databases from the contents of /var/lib/mysql?

Using CentOS 6.4 x64. Not sure what happened but somehow my VPS filesystem got corrupted and it is now in a permanent read-only state. I've been working with my hosting provider's sys. admin. but ...
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Error while taking backup in SQL Server

Before few month box of SQL has been crashed. We have almost database back with some tools and running application smoothly on it. But when i try to take backup of database at that time it gives error ...
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2k views

Possible schema corruption. Run DBCC CHECKCATALOG

Good Evening to all. I was working with sql server 2008. Thing i did: Actually i was noticed that the free space available in C drive reaches below 1 GB .So i thought to Club the D drive with C ...
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471 views

MyISAM : Should I be concerned by these warnings?

I restored some tables from recent Databases backups. Because Im supporting a legacy system that only uses MyISAM tables in their DBs, for backing up I used a little script that pretty much copies all ...
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204 views

CHECKDB Allocation Errors Msg 2576, could not repair, object id does not exist

I inherited a database that has no value in LastKnownGood. I ran repair allow data loss, says it was successfully repaired, but no change to the errors when I run checkdb again. In case it was a SQL ...
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3k views

Fixing a corrupt Log File in small downtime window

I am working with a client who has been receiving the following error from their Log backups of one of their SharePoint databases: Backup detected log corruption in database FOOPORTAL_SP2010_Config. ...
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2k views

Cannot access Properties page of a database

I'm in the process of decommissioning a database server and migrating the databases from one server to another. I was attempting to get the the properties of the database and received a SQL Error ...
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309 views

RDS MYSQL instance rebooted and won't load INNODB table

So my production db in RDS apparently either crashed or was rebooted during a version update, and upon being restarted mysql couldn't load one of the innodb tables: as evidenced by the following error ...
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4k views

ORA-15081: failed to submit an I/O operation to a disk

I have a test environment for Oracle single instance on ASM 11.2.0.3. I have restored database from tape and during the recovery, the system crashed by some I/O error. I restarted the server, ...
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497 views

How can I repair a TokuDB table?

I have a TokuDB table that works fine for most queries, but segfaults on others. I did a CHECK TABLE which indicated that the table had errors. However, TokuDB doesn't support REPAIR TABLE. How can I ...
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Why does data get corrupted in “large” text files - Reasons to use database

I am just starting to learn about databases and using mysql. I read that databases are more reliable than having large ascii text files and that ascii text files are more prone to corruption as they ...
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Trying to restore a corrupt Postgresql database, with corrupt data folder. Able to start postgres but the tables are empty?

Postgres 9.3 on Ubuntu 12.04 We had some disk corruption on our server, and after doing a fsck the database would not start. To get us back into production, I copied the postgres data folder, blew ...
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2k views

Strategy for Repair Database on SQL Server 2008 R2 Standard

(one guy pushed green button instead of blue, three racks left as was his original target, probably green is nicer then blue, on this SAN are saved database files) after this accident I'm run ...
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sql server 2008 r2 DBCC checktable error

This morning my database went into suspect mode. I reverted back to last night's full backup to get it back online. I went through the error log and found the last command that appeared to cause the ...
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7k views

MySQL relay log corrupted, how do I fix it? Tried but failed

A MySQL v5.1.61 relay got corrupted when the machine suddenly shut down. I tried to fix it but it didn't work. — How do I fix it? Did I do something wrong? As far as I've read, corrupted MySQL relay ...
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906 views

FATAL: catalog is missing 1 attribute(s) for relid 2662

I have a server with PostgreSQL9.1-903 (Windows 7 Professional). After a power cut my database is inaccessible (I presume that the database is corrupted). The postgreSQL service starts but the ...