Causes Of Error 823 In Sql Server And How To Fix It

Do you encounter Input/Output (I/O) errors while accessing a MS SQL Server database? Are you unable to run queries on or access data from MDF (Master Database File)? This behavior indicates system or hardware problems with SQL Server that corrupt the database and renders it inaccessible. It leads to critical data loss situations. In order to extract data from Microsoft SQL Server in such situations, you need to opt for solutions.

Hardware and system problems in SQL Server are generally indicated by an error message, similar to the following one:

Error 823
I/O error detected during at offset in file ”

You come across this error message when SQL Server attempts to read data from and write data to the database files. Format of this error message can be different, depending upon the version of SQL Server.

Cause

You come across this error message, if any of the below conditions are true:
Operating system error.
I/O logical check failure.
MS SQL Server database corruption.

If any of the above situations occur, it becomes essential to perform SQL Server Recovery by resolving it, to retrieve inaccessible data.

Solution

Try out the below things to fix up this issue, as per the cause of the the problem:

Operating system error: The read Windows API (Application Programing Interface) call or the write API call is unsuccessful and MS SQL Server experiences operating system errors, which is related to Windows API call. Run operating system integrity checking tools. Following is the example of operating system error:

2003-07-28 09:01:27.38 spid75 Error: 823, Severity: 24,
State: 2
2003-07-28 09:01:27.38 spid75 I/O error 1117 (The request could not be performed because of an I/O device error.) detected during read at offset 0x0000002d460000 in file ‘e:program filesMicrosoft SQL Servermssqldatamydb.MDF’
I/O check failure: If specified logical data checks are unsuccessful, you may encounter this problem. Run DBCC CHECKDB to solve this issue.
Database corruption: Restore the database from recent backup. If the backed is unusable, Recover SQL database through third-party applications.

The software are powerful enough to handle most of the database corruption issues. The applications use high-end scanning methods to ensure absolute recovery. They are incorporated with rich graphical user interface to provide quick and easy recovery.

SQL Recovery is the most advanced and powerful utility that is able to effectively handle all database corruption scenarios. The software works well with Microsoft SQL Server 2008, 2005, and 2000. It restores all MDF file objects such as tables, reports, forms, constraints, stored procedures, triggers, data types, and more.

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Sql Server

SQL is Structured Query Language. SQL is basically a database language primarily designed for managing and manipulating data in DBMS or RDBMS.

DBMS is Database Management System and RDBMS is Relational Database Management System. DBMS and RDBMS both are the procedures to store data in the form of columns and rows. The main difference between both is that in Relational Database Management System we can make a relationship between the tables. In RDBMS we also have an additional feature of putting constraints and ensuring security with regard to data manipulation. SQL Server is referred to as a server that implements Structured Query Language.

Following are the types of SQL Servers:

SQL Server 2000
SQL Server 2005
SQL Server 2008
SQL Server 2008 R2

SQL Server 2000: SQL Server 2000 is a relational database management system that offers a variety of administrative tools to ease the burdens of database development, maintenance and administration. It was introduced in 2000 and the code name for this is Shiloh. In 2003 SQL Server 2000 64-bit Edition was introduced and its code name is Liberty.

SQL Server 2005: SQL Server 2005 was released in October 2005. It is the advance version of SQL Server 2000. Its code name is Yukon.

Features of SQL 2005 are:
Multiple Active Results Sets This feature allows usage of database connection for multiple purposes. Also known as MARS.
Provide support for managing XML (Extensible Markup Language) data, in addition to relational data.
Database Mirroring This is the technique of copying data from one location to another (storage device) in real time. With the help of data mirroring we can easily recover critical data.

SQL Server 2008: SQL Server 2008 was released in 2008 and the code name for this is Katmai. SQL Server 2008 comes up with new features for data management these features were:
Self organizing
Self tuning
Self maintaining

SQL Server 2008 R2: SQL Server 2008 R2 is the latest available version. The code name for this is Kilimanjaro (aka KJ).

Features of SQL Server 2008 R2 are:
Master data management system or Master Data Services
Multi Server Management

As a SQL Server Consultant and Microsoft Certified Trainer. I provide solution for all the queries related to SQL Server.

For more details please visit:

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