Though, I am not sure why the LDF was deleted This post discusses this method along with the limitations. You will need to “hackattach” SQL server at this point and even then, that can be a painful experience This one will cause you a world of hurt, because SQL Server will fail to attach on the second server and on your primary. Not to mention, in most systems, you will not be able to do this right away and will delay the problem furtherĭetaching and moving the SQL server to a new server This just delays the problem and causes the system to run through crash recovery on the databases.
When first receiving that corruption notification people will try to do a slew of items that will not help them. Additionally, according to this infographic from Small business trends, 60% of small businesses that lose data will go out of business within 6 months.
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Describing, “no full ACID guarantee” to logical consistency and business logic needs to be validated manually after running. I invite you to read the section on running repair allow data loss on the Microsoft docs, their warning is a good enough reason to make sure you are properly monitoring your database. Such as running a restore or repair with data loss as the first option, these can cause massive data and monetary losses for the company and should be only done in an absolute necessity. This can cause you to make some chaotic decisions that put your company in a worse position. When people first find out they have corruption they instinctively start to freak out.
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In this series, we will discuss what to do when you encounter corruption, how to know you have a corrupted database, some basic recovery techniques and some other pointers. In short, if you notice you have corruption sooner it increases you odds of recovery with minimal to no data loss along with decreasing the amount of downtime required. SQL Server does checking automatically but its only on pages that have been read into memory, if you have a large Database or do not hit those pages until year end reports it is possible your backups will not go far enough back to allow you to quickly recover that corrupted page (talked about in How to perform a page level restore in SQL Server article) or table. Many administrators do not notice they have corruption until it is to late. However, this is not enough to keep you out of the dog house. This means good backups and of course running DBCC CHECKDB. While there is no way to prevent the corruption from happening, we must work hard to implement practices that minimize damage caused by the corruption. SQL Server Database corruption happens all the time around the world and while most of us have been lucky enough to avoid it, we should still be prepared. Send us feedback.Corruption is a looming thought through every administrator’s mind, from sysadmins to database administrators there is always a monster hiding in the shadows.
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