• 25 February 2022
  • 5 replies

Userlevel 3
Badge +11

Hi Team,

My Primary Copy is not using deduplication . If i enabled WORM at storage policy copy level , would there be any impact on backup library storage consumption .

I guess 2x to 3x additional capacity is required only when we enable WORM on deduplicated backup copies.

Please let me know if my understanding is right ?


Best answer by Orazan 25 February 2022, 16:29

View original

If you have a question or comment, please create a topic

5 replies

Userlevel 6
Badge +15

Good morning.  There should be no difference in the impact from a deduplicated or non-deduplicated standpoint.  A Worm copy just does not allow micro pruning or pruning of any kind until retention is met.


Userlevel 3
Badge +11

@Orazan :

Iam talking about consumption on storage backup library .

Don't i need to seal my DDB for deduplicated copy every time when the retention is met if WORM is enabled .

Are you saying that storage consumption will be exactly same if i enable or disable CV WORM feature on deduplicated storage policy copy ?

Userlevel 6
Badge +15

I apologize I misunderstood.  Yes the DDB will seal every time that retention is met.  That DDB can not be aged off until the full retention is met so yes WORM of deduplicated data would have a larger footprint on storage than a WORM copy of non-deduplicated storage.  

It is more common to see WORM copies configured with longer retention so the seal of the DDB is not happening often.  If you have very short retention, I would recommend leaving it non-deduplicated so that you will not be sealing say, weekly or biweekly.

Let me know if that explains it better or if you have any other questions.

Userlevel 3
Badge +11


I have a retention of 30 days and some of my backup data is deduplicated while some in non-deduplicated .

Questions →

  1. For existing Deduplicated copy to convert as WORM enabled with retention of 30 days , how much additional storage is required . 1.5x , 2x , 2.5x, 3x ? Consider x is the amount of current storage requirement for dedupe copy without WORM.
  2. Do i need to manually SEAL DDB after every 30 days or CV will automatically seal and create new DDB after every 30 days .
  3. For non-dedupe copy will there be any increase in my storage utilization after enabling WORM on storage policy COPY ?
Userlevel 6
Badge +15
  1.  Your first question would be better answered by our Professional Services department as they have the tools that can be run to give a better picture of exactly how much additional storage would be needed.   It is not a static number, such as “a multiple of X”
  2. No you do not need to manually seal.  The software does this for you.
  3. There should be no noticeable increase in storage utilization after enabling WORM on a non-deduplicated Worm copy.