GutoVeronezi commented on issue #8477:
URL: https://github.com/apache/cloudstack/issues/8477#issuecomment-1883423754

   > ok, I didnt notice that fortunately if snapshot.backup.to.secondary = true 
then the volume snapshot will be removed from primary storage when backup into 
secondary is done (so this is move actually in the end). But there is no option 
anymore to take volume snapshot straight to the secondary as it was before? I 
have to consider then this dirty trick what i mentioned.
   
   Actually, ACS always stored the volume snapshot on the primary storage first 
and then copied it to the secondary storage :smile:. The catch is that, before 
4.17, ACS was taking a full VM snapshot and saving it internally in the root 
disk (which is in the primary storage); then, it would extract the snapshot to 
the secondary storage. Following there is the previous workflow:
   
   
![image](https://github.com/apache/cloudstack/assets/38945620/62257297-44ff-4d50-9851-290949bcc18b)
   
   You can also check issue #5124 for reference.


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