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Small question about consolidating backups

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The backup scheme that I use is that I create a full backup after every 5 incremental backups. So
full1
inc1_1
inc1_2
inc1_3
inc1_4
inc1_5
full2
inc2_1
etc.

My first though to save disk space was to consolidate a full and its incremental backups of older backups. However, I feel that I just as well can delete the incremental backups. That would leave me with all of the full backups. Or do I overlook something?

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Which particular ATI version are you referring to for this new topic?  (2010, 2016 or 2017)

Yes, you could delete the incremental files and keep the full backup files but if you do so, then you will see error messages from ATI when you run any new backups.  The reason for this is that ATI keeps information about all backup files in an internal database and it refers to that information when creating a backup.

If you do delete any .tib files manually, then you should run a Validation for the backup task then answer the pop-up error messages that are shown, taking the Ignore option where offered.

I use TI2010 so I can delete individual .tib files by the GUI.

Ok, then TI2010 provides an option in the GUI to allow deleting of .tib files which also updates the metadata database information, so no validation is needed. 

Note: This is brought back in ATI 2019 & 2020 with the Clean up versions option / tool (missing from earlier versions such as 2015 - 2018).