In this post, we will look at how to calculate the tape required on veeam.
Before we proceed, let's understand the tape LTO size
For example LTO9, one tape size should be 18 TB. Always refer to native raw when doing tape calculations. Veeam has compression & dedupe when backup, so when storing data into a tape you should refer to native raw.
Next is using the calculator here:- https://calculator.veeam.com/vbr/
It is the same calculator that we use to calculate the backup repository. We just need to do some tweaks when calculating tape consumption.
- Put source size: 100 TB [our example]
- scope of work - set to 1
- Turn off refs
Example: 7 day, 4 week, 12 month, 3 years
Retention, put
- daily - 7
- weekly -3
- monthly - 1
- yearly - 1
End result
Put into a table and start to divide according to LTO 9. Example for daily - 31/18 = 2 [round up]
The total tape required for 3 years is 82 tapes.
I did a video explaining how I came out with the above tape. Please watch the video below:
