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Incremental Backup Strategie - When Failed

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When I choose an incremental backup strategie and one or more of incremental backups failed between other incremental backups for any reasons do I still have a reliable backup chain?

Example:

Monday: OK

Tuesday: OK

Wednesday: failed (but a small file exists)

Thursday: OK

Friday: OK

 

 

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Most likely yes - it should still be usable.  

However, the only real way to be sure is to test a recovery to a different disk and see how it goes.  You don't want to try a restore to the only disk that has the original data and have it fail or get overwritten by something corrupt (especially if it's a full disk/partition backup that has the OS on it).

If you are doing incrementals for life - that is a risky move (not sure if you are or not ,but wanted to point that out) since all incrementals depend on the ones that came before them and the risk for corruptoin somewhere in the chain is going to be much greater the longer the incrementals progress on.  

I would always suggest a backup plan that includes fulls at different periods of time - either with a new backup task in Windows, or using the offline bootable recovery media (that is the best method for a good backup as it completley rules out any Windows issues which can vary so much from system to system based upon the installed apps, hardware, pessonal customizations to apps and the OS, malware, Antivirus, etc.)