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Incremental Backup. How does it know when a file was backed up last.

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When running an Incremental backup.  How does the client determine when a file was backed up last.

Does it use the Archive bit which other backup software uses.  Or does it compare files to a database and ignore the archive flag on a file.

 

 

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Hello Andrew,

We don't use the Archive bit.

Depending on the backup option, we either do a fast comparison of file size and modification date or we look at the actual blocks that make up the file.

https://www.acronis.com/en-us/support/documentation/AcronisBackup_12.5/…

JFYI, this information is checked on the fly using the existing archives. The only time we use a database to store metadata about the contents of the backup is when cataloging is enabled. The catalog is used purely for searching for files in the backup and nothing else.

This makes our backups portable, meaning you can just copy the backup file to a removable media and use them with any other Acronis installation or bootable media to do whatever.

 

Ok so bottom line it does a quick compare from the last time if any and backs it up.  And ignores any use of the archive bit.

Thanks.