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Friday, November 17, 2017

Verify Backup Data to Avoid Silent Data Corruption in Backup Chain

How to avoid data corruption due to unavoidance circumstance due to hardware failure which use to keep your backup data?

You backup data may corrupt in the middle of the backup chain. Example:-

  • Full copy - Sunday
  • Incremental - Monday
  • Incremental - Tuesday
  • Incremental - Wednesday
  • Incremental - Thursday
  • Incremental - Friday
  • Incremental - Saturday
Corruption on Wednesday! :(

Accident due happen and you may not realize that your backup chain consists of corruption. It can be
Mechanical wear for tape or hard drives.

If you're using Veeam Backup & Replication, there are few things that you should do to avoid silent data corruption.

1. Modify Backup Job to "perform files health check (detects and auto heal corruption) based on schedule basic. [Under Maintenance Tab | Storage Level Corruption Guard]

 2. Create Surebackup Job to perform verification of your backup. You can enable "Validate entire virtual disk content (detect silent data corruption) [ Under Settings]

3. Use Veeam Validator to check your existing backup chain. Please refer to KB 2086:-

It is essential best practice to implement the 3-2-1 rule and always make 3 copies of data, store it on 2 different media and keep 1 copy on the disaster recovery site to avoid situations similar to the current one.

Hope this help.