JoaoJandre opened a new issue, #9446:
URL: https://github.com/apache/cloudstack/issues/9446
##### ISSUE TYPE
* Bug Report
##### COMPONENT NAME
~~~
Storage
~~~
##### CLOUDSTACK VERSION
~~~
4.19.0
4.19.1
4.19.2
main
~~~
##### CONFIGURATION
N/A
##### OS / ENVIRONMENT
Env with XenServer
##### SUMMARY
When deleting a snapshot on XenServer, all of its parents will be erased,
causing data loss.
##### STEPS TO REPRODUCE
~~~
1. Create a VM
2. Take a volume snapshot (S1).
3. Access the VM and write some data, for example with: dd if=/dev/zero
of=test bs=1M count=1000
4. Use sync to make sure data is written to disk
5. Take a second volume snapshot (S2).
6. Delete the last volume snapshot (S2).
~~~
##### EXPECTED RESULTS
~~~
Only the last volume snapshot (S2) is deleted.
~~~
##### ACTUAL RESULTS
~~~
On the UI, only the last volume snapshot (S2) is deleted. However, actually,
the whole snapshot chain is deleted (S2 AND S1). This can be verified directly
on storage or through the snapshot_store_ref table. Any operation with the
deleted snapshot (S1) will fail.
~~~
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