If you are using SQL server then it is obvious that you will face problem some or the other day with it. There are many users who come across several database problem especially when lots of information are stored on it. The data stored in the database are known as MDF files. Generally SQL server consists three types of files which are MDF, NDF and LDF.

There are several pages are used by the MS SQL Server to manage and store its allocation structures. Among them a page is called Global Allocation Page (GAM). This page is used to store the information about the allocated extents in that SQL Server file. An indexed allocation map (IAM) page are use to store the information about the extents that an index/table uses.

MDF File stands for master database file, it stores the structure of the database such as tables, views, procedure, Rules, Trigger and functions and finally the data. It is the file format of the MS SQL database, and entire database is stored in the .mdf file so that data can be easily accessed, entered and modified.

But sometimes .mdf gets corrupted due to any internal or external error and if the .mdf file gets corrupted then it can corrupt the entire database or make it inaccessible. This file contains the structure of the database and all operations are executed on to a single .mdf file so that it can be easily got corrupted.

SQL Server offers its user with various features for storing, creting and managing vast size huge database for maintaining its records. It is facilitates the user with lots of features as it also allows creation of database in query language, manage numbers of databases even of large sizes but beside providing this awesome and useful features to the user it also get corrupted which something can be reason for inaccessibility error via SQL error 824 in the database. There are so many reasons behind the corruption it must be internal error, or having problems within the database shows the errors within a SQL Server database.  

The Microsoft SQL Server administrator needs to know how to recover the corrupt master database. The Master Database helps to store the logins and most importantly, the pointers to the entire database. Without the master the database you cannot successfully start the SQL server. This process of recovering the master database is the event of corruption and shows how to rebuild the master database if necessary.

MS SQL Server is a relational database management program that helps to store and restore data files from the database.  It helps to manage large data by users for storing files in bulk database without any limitations that gets imposed on its file size or number of storage space that is done on it.  But even this some or the other things may cause the inaccessibility issues on the database such as  malfunctioning of the server or the system, , server crash, hardware crash, corrupt sector,  improper shutdown of the server or system, malware intrusion etc. in such circumstances the users demanding procedures may get damage and restricts from executing SQL.

One of the most frustrating situations for a DBA (Database Administrator) would be corruption of the database. If the database contains highly precious data then it might lead to disaster. Database such as SQL Server does not guarantee that its database files are immune to corruption. But these database files are prone to corruption and they can get corrupted at any time due to particular reason.