Hello @ataxlab canary ,
When you resize the OS VM disk it will just replace the original disk.
- For example , lets say right now you have a VM1 with OS disk name disk1 with 127 GB
When you try to resize the OS disk1 to 256 GB , it will just replace the original one.- If you just delete the VM , then OS disk will be retained .
(FYI - OS disk can be resized only when the underlying VM is in stopped state)
Let us know if you have additional questions.
(If the above clarifies your query , kindly upvote and accept the answer )