# Did duplicati backup everything? **URL:** \ **Category:** Support\ **Created:** [September 12, 2017, 11:00am UTC](https://forum.duplicati.com/t/did-duplicati-backup-everything/590 "2017-09-12T11:00:36Z")\ **Posts on this page:** 1\ **Showing post:** 8
**Author:** ![tophee](https://forum.duplicati.com/user_avatar/forum.duplicati.com/tophee/32/21_2.png) [@tophee](https://forum.duplicati.com/u/tophee)\ **Post date:** [September 13, 2017, 6:12am UTC](https://forum.duplicati.com/t/did-duplicati-backup-everything/590/8 "2017-09-13T06:12:03Z")
> [@davegold](#): > > Corporate backup standard is to do periodic restore tests. Yes, of course, but I thought duplicati already has that built in (it downloads a random block after every backup and checks it) See here: > [@How often does duplicati test your backup archives?](https://forum.duplicati.com/t/how-often-does-duplicati-test-your-backup-archives/216/2): > > Duplicati uses two levels of verification. Before doing anything, it lists all the remote files and checks that all files are found and have the correct size. It also checks that there are no new files. There is a feature request to also check the remote files against an MD5 or SHA-1 sum if the storage provider reports it. The second step is actually downloading a file and testing that it can be decrypted, decompressed and that its contents are as expected. This is done with a random sampling … --- _[View the full topic](https://forum.duplicati.com/t/did-duplicati-backup-everything/590)._