Questions tagged [corruption]

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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Corrupted ibdata1 and can't run server

I am running a local dev environment on OSX. I restarted the machine earlier, and since then, I cannot load mysql server. I am running mysql 8.0.23 I get the following message when I try to load ...
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215 views

Corrupt a database page in a certain table then restore it

I want to corrupt a page inside a certain table and restore it. How do I do that on SQL Server?
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DBCC Check DB fails due to operating system error 665

We have a SQL Server 2017 Standard version where recently the CHECKDB is failing with the operating system error 665. The fragmentation level of the disk drive is 0% as it is automatically ...
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23 views

Oracle can not find a record with a specific field

In our application we face an weird situation, consider a table name TAX exists in the database, when I query it with select * from tax where fk_pay = 123456 a record is returned with id = 654321 but ...
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How to avoid errors 135 (no more room in file) and 176 (wrong checksum) when repairing a corrupted partition in MariaDB

I have no prior experience working with partitioned tables, I got a corrupted partition and all my repair attempts have failed. I would really appreciate your help. The affected table is created as ...
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PostgreSQL 9.5 database showing signs of corruption in logs, though clients work normally

We have a database server running PostgreSQL 9.5 on a Ubuntu 16.04 LTS box, with the total data size just under 30 GB. We've set archive_mode to on, and archive_command is rsyncing WAL files to ...
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249 views

Oracle 12cR1 - RMAN-11003, ORA-00354, ORA-00353 - Corrupt Redo Log

Oracle 12cR1, disaster database. ORA-00283: recovery session canceled due to errors ORA-00354: corrupt redo log block header ORA-00353: log corruption near block 8 change 80357235718 time 11/01/2020 ...
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121 views

DBCC CheckDB : Operating System Error 27(The drive cannot find the sector requested)

So my regular DBCC check had this lovely message waiting for me in the error logs this morning. I've been trying to find out more about this issue and what can be done about it. Manually running DBCC ...
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196 views

How do pages get updated checksum when switching page verification mode from torn page to checksum?

Have an older but large db (6tb on the san) that still has its page verification option set to TORN_PAGE_DETECTION. How do you apply the new checksum to all existing pages when changing page ...
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429 views

Backend on server keeps getting into an inconsistent state

I built an Access database. It was originally meant to be for 6 people but I see that it's up to about 20, so that could be the problem. Anyway, the backend gets into an inconsistent state a couple of ...
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PFS Corruption after restoring SQL Server 2012 database to 2016

We migrated few SQL Server 2012 databases over to SQL Server 2016 over the weekend. Old Server Details SQL Server 2012 SP4 11.0.7493.4 DB set to compatibility 110 TDE Enabled - Yes Recovery Model is ...
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246 views

What is difference between starting Instance with -T3608 and with -f?

I simulated a corruption of model database on test environment just for learning purposes. While reading others blogs and articles about it I stuck on the question, what is difference between starting ...
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Is there any way to recklessly drop a principal leaving orphaned objects or should I assume only data corruption could cause it?

Given that SQL Server blocks me when I try to DROP a principal that owns an object in the database, if I see an object which the owner no longer exists, should I assume right away it was data ...
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Database in suspect mode

I'm experiencing a tough issue for me. When I was updating some columns into the database I have previously installed, the main memory corruption led the database jump into the suspect mode. I follow ...
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1answer
29 views

Database system checksumming to prevent network corruption not caught by TCP checksumming

Since TCP checksumming is not sufficient to detect/prevent all corruption, do modern database systems (e.g. SQL Server, MariaDB / MySQL, Oracle, etc.) use any additional checksumming of network ...
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83 views

SSD used for tablespace died. How can I recover data?

I have a postgres cluster with two databases Database A uses the default tablespace. It holds important information but has very few writes per day (< 20) and only has a few tables with a few ...
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Restore got failed in sql server

While i restore my database i got the below error. But i have more space in my drive. modify file encountered error 112 (Ther is not enough space on the disk)while attempting to expand the physical ...
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102 views

SQL Server 2016 table corrupt [closed]

I have an SQL Server 2016 v13.0.5101.9 hosting Sharepoint databases. The weekly DBCC CHECKDB job discovered database corruption (or inconsistency): Msg 8928, and Msg 8965 popping up. I narrowed it ...
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Load PostgreSQL database from corrupt drive [duplicate]

I suffered corruption of a hard drive but managed to recover files for a PostgreSQL server. We are running on the assumption that the files themselves are not corrupted (yet to be able to tell). My ...
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53 views

SQL Server - SQL Agent Alerts - Alert 824 warning about old problems

I have alerts enabled on a SQL Server 2017 where corruption was encountered and repaired over a year ago. I have also confirmed that there is no new corruption on any database on this server. When ...
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123 views

how can I solve RAID 5 corrupted data? [closed]

I installed Windows Server 2012 on my server using RAID 5. But a problem occurred on my server. I extracted the data from 10 hard disks with data recovery. When I attached the extracted data files in ...
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1answer
209 views

Entries in suspect_pages but checkdb shows no error

I am using Microsoft SQL Server 2016 (SP2-GDR) (KB4505220) - 13.0.5101.9 (X64) Jun 15 2019 23:15:58 Copyright (c) Microsoft Corporation Standard Edition (64-bit) on Windows Server 2012 R2 ...
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1answer
408 views

Is it safe to restart PostgreSQL if process terminated for some reason?

I am writing a docker-compose config with a container with PostgreSQL in it. docker-compose has a configuration options called restart. If I enable it then whenever the Postgres process stops it will ...
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638 views

PFS Page corruption issue and question

We recently encountered PFS page corruption in our production DB.  We are in the process of checking old backups to find which ones are clean, but I was wondering if a different process would work to ...
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MySQL Won't Start - InnoDB Table Corruption

I've found lots of articles and questions related to this issue, but none that seem to apply or work in my situation. MySQL will not start after I had to do a fsck repair on my server's hard drive (...
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155 views

Error 23 on transaction log backup, full backup works fine

I have a database with the database files on the E: drive, and logs files on the D: drive. I'm getting the following error when trying to run a transaction log backup: Read on "D:\LOG\AOA_Log.ldf" ...
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MySQL Service won't start with error [ERROR] InnoDB: Trying to access page number 4294963199 in space 0

My MySQL installation on Ubuntu 18.04 crashed and now won't start. The error log says Trying to access page number 4294963199 in space 0, space name innodb_system, which is outside the ...
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83 views

Is there a possibility of data corruption/lost when inserting large blob data from one table to another table in the same database?

I am trying to determine if data corruption/lost is possible when moving large data from one table to another in the same schema. I am new to programming and database is not my forte. Anyway I've ...
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1answer
50 views

Is it possible to restore a database from corrupted .mdf file?

I know that the answer of the question may vary depending on what exactly is broken in each .mdf file - only looking for advice if there is another way to approach this. So, I have received some bad ...
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52 views

Corrupted Access Database

I have a big Access database, with aobout 150 Tables/Queries/Linked txt files/Macros/Modules. I was working today, and then from out of nowhere the database got corrupted. I googled, and forund that ...
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249 views

End of file reached. Error 38 in SQL. Passes verification checks

Having issues restoring a database in SSMS, error 38. The databases are transferred up to google via their Drive API. Download it on my side and has error. If I transfer it through teamviewer ...
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314 views

In a replication setup, does corrupted data also gets replicated?

Say one of the tables got corrupted, will that corrupted table still get replicated to the other DB? Or, will the replication stop to prevent the other DB from being corrupted too? Note: Question is ...
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How to get the corrupted table from a log file in hex?

I'm running a Magento 2 site, everyday we have a MySQL shutdown because of some corrupted data, we don't know the table causing the issue, this is what the error logs shows: Version: '5.7.26-...
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87 views

After upgrading from PG 9.3 to 10 indices became corrupted

So recently I was upgrading the database in production from Postgres 9.3 to 10. In addition to upgrade, we wanted to move the database to another machine. I know, doing it "in place" would be easier ...
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358 views

MariaDB corrupted after attempting full backup with mariabackup

I have Mariadb installed on a Raspberry Pi with a simple star schema for logging data that comes in on a Modbus server. Everything was running fine for about a month and a half until one day I was ...
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686 views

Errors during CHECKDB

We have a db which reports errors when trying to do a backup: Starting to dig in, the first thing that was suggested was to run DBCC CHECKDB. I've been trying to run that all day now, and googling ...
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1answer
2k views

How to repair corrupted PostgreSQL pg_toast error

The hard drive on my PostgreSQL 9.5 server died, but I managed to recover most of the data. I've restored the database to a solid state hard drive, and I can access most of the data. However, when I ...
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1answer
149 views

PostgreSQL: Issue with a corrupted GiST index on ll_to_earth

I'm facing something that seems like an index corruption issue on a table that stores about 120k entries. Each entry has a latlon and this latlon is indexed using the ll_to_earth GiST implementation: ...
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952 views

InnoDB ibdata1 corrupted, innodb_force_recover not working

I think I have checked every post in the internet. Thing is my MySQL (MariaDB) won't come up and after much testing I have seen it is because of the InnoDB files. I have tried with different ...
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794 views

sp_MSforeachdb Continue on failure when running DBCC CHECKDB

I have the following maintenance script DECLARE @sql NVARCHAR(30) = 'DBCC CHECKDB(?)' EXEC sp_MSforeachdb @sql This checks every database for corruption. I have run this on my test server where I ...
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221 views

Is mysql using some kind of auto repair due to “check table” warnings?

Today i noticed a "strange" behaviour of MySQL when using "CHECK TABLE" on a crashed table. First i got a warning like "Size of datafile is: * ... Should be: *" but i could still "insert into / select ...
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1k views

How to refresh Oracle data dictionary to remove deleted tablespace and datafiles?

Long story short we have a server with two Oracle instances running on it: ora1 and ora2. Somebody defined an undo tablespace for ora2 and provided the same datafile of the undo tablespace datafile of ...
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143 views

InnoDB: Getting rid of a phantom table

I was playing around on a test server and i actually removed both "frm" and "innodb" files of particular table. Ok - I tried creating that table again but got information that table already exists and ...
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1answer
2k views

error code 3417 - after installing CU for SQL SERVER 2016 SP1

I am getting below error message after installing cumulative updates for SQL Server 2016 Sp1. The description for Event ID 7024 from source Service Control Manager cannot be found. Either the ...
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191 views

Unable to drop table/database when using innodb_force_recovery = 3

I'm attempting to follow several guides to recover a corrupted database, by setting innodb_force_recovery to 3, dumping the database, dropping the database, and then importing it back in. I'm able to ...
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122 views

What may cause MyISAM index corruption?

I've had an error message telling about index corruption on the .myi file Reparing the table fixed the issue This table is accessed with select only, so what is likely to corrupt indexes ? CREATE ...
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5k views

How to repair corruption for “Possible chain linkage problem.”

I have large table with 15 000 000 record and suddenly Select Top stopped working. I use MS SQL Management Studio. This is not working, the query return 0 records: SELECT TOP (10) [Id] ,[...
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1answer
1k views

Backup detects corruption, but CHECKDB does not

I have a database where when I run the backup command BACKUP DATABASE [MyDatabase] TO DISK = 'G:\Backup\MyDatabase_01_01_2018.bak' WITH NOFORMAT, NOSKIP, COMPRESSION, INIT, BUFFERCOUNT = ...
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3answers
2k views

Postgres cannot be restarted after disk ran out of space

My HD ran out of space while a postgres was running. I had to kill postgres and freed some space. Now I am not able to restart postgres with the following error message: LOG: listening on IPv4 ...
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1answer
168 views

corrupted Oracle 11g database

At a client site with a development Oracle 11.2.0.3/linux DB power outage and crash - no archivelog mode - no backups - Don't know how this was even running select file#,substr(name,1,70) name, ...

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