Eager to know the ways to repair corrupt sql .bak file? We can help you to fix it.

Here at Bobcares, we help web hosts and online service providers to repair corrupt sql .bak file as part of our Server Management Services.

Today, let’s get into the details and see how to repair corrupt sql .bak file.

Reasons for corruption in a .bak file?

The file can turn corrupt due to the following reasons,

1. Unusual system termination or crash, when the database is open.
2. When the device used for storing the backup file is virus infected.
3. Bugs in the SQL server.

Usually, depends upon the database criticality and the recovery model, customers prefer SQL server to take regular SQL backups. There are different types of Backup in SQL server.

1. Simple Recovery Model: Full and differential backup
2. Full Recovery model: Full, differential and log backup

How to repair corrupt .bak file in SQL server

Many database users take regular database backups. However, there are some chances for the database to be down. The unexpected issues include database corruption, server down, or hard disk failure.

So, we want to restore the last full SQL backup to recover the database. But we cannot restore the database backup with the corrupted backup file. In such a situation, we have to restore the backup to retain the data.

If we do not have a healthy database backup in a disaster scenario, we lose data since the previous successful valid backup. However, we can repair the corrupted .bak file.

This can be done by repairing the data (.MDF) file, by using DBCC CHECKDB repair option

ALTER DATABASE DBName SET SINGLE_USER WITH ROLLBACK IMMEDIATE;
BEGIN TRANSACTION;
DBCC CHECKDB ('DBName', REPAIR_ALLOW_DATA_LOSS);
ALTER DATABASE DBName SET MULTI_USER;

Here, replace DBName with the database name.

Also, it may lose some data after executing REPAIR ALLOW DATA LOSS command. However, this restore method is very helpful when there are no backups are available.

In addition, we take a copy of the data file before using any method or tool. And, some repairing tools are also available to recover the corrupt .bak file.

[Need assistance to repair a corrupted database? We’ll help you.]

Conclusion

In short, when it comes to a data disaster, a database backup is so important. Today we saw how our Support Engineers repair corrupt sql .bak file for our customers.