Solved Backup Rotation

Currently reading
Solved Backup Rotation

DS209j | DS210j | DS410 | DS214 | DS216+II | DS916+
Dear Forum,

I'm still having troubles to get that right: How do I set up Backup Rotation right?
I hope you can clarify this for me.

What I want: Daily backup, only keep one version per month during the last 12 month, older versions only 4 per year (every 3 month).
My settings:
Bildschirmfoto 2019-08-05 um 16.15.18.png

The preview window shows me one backup-version after 4 weeks, one after 8 weeks, … thats fine.
Bildschirmfoto 2019-08-05 um 16.15.04.png

But what I get is one version per day, so it takes a huge amount of target-disk-space…
Why are the intermediate versions not deleted?
Bildschirmfoto 2019-08-05 um 16.15.36.png

Thank you for any hints.


NAS Support
DS718+, DS918+, 2x RS3614RPxs+
  1. RT1900ac
  2. RT2600ac
  3. MR2200ac
Operating system
  1. macOS
Mobile operating system
  1. iOS
Just to confirm, this is HyperBackup?
DS209j | DS210j | DS410 | DS214 | DS216+II | DS916+
Synology support gave the answer:

Please note in general: When the set amount of versions won't be reached, so the rotation also won't be activated or run in backround to delete older versions. Please double check this. This is a very common for many cases.

We recommend to set up the intelligent rotation named "smart recylce". Please read also below hyper backup rotation options:

DiskStation Manager - Knowledge Base | Synology Inc.

With best regards

So rotation rules only apply if you are exceeding "the max number of versions". This approach doesn't make a lot of sense to me. It will take much more backup space than actually needed until you reach the max number…

DS209j | DS210j | DS410 | DS214 | DS216+II | DS916+
That's what I did now - it's just a little hassle to calculate the right number of versions to be sure to keep the oldest one… :/

Create an account or login to comment

You must be a member in order to leave a comment

Create account

Create an account on our community. It's easy!

Log in

Already have an account? Log in here.

Similar threads

Welcome to! is an unofficial Synology forum for NAS owners and enthusiasts.

Registration is free, easy and fast!

Trending threads