I have an instance with 40G of storage with 4 VCPUs and 8G memory. I attached 1TB of ceph block storage to this instance and used it as a root storage using LVM. Total I have about 969G available in '/'. Now I want to resize the instance to flavor 16 VCPUS and 16G memory with same storage. Whether I need to detach the attached volume first before resizing or not?? Because this instance is very important to me I dont want this Instance to go to error state. Thats why iam asking this question. sorry. I already tried Resizing of instances with 'openstack server resize' and it works fine. But I didnt test the resizing of instances with volume attached before. Any information regarding this is highly appreciated.