On Wed, Oct 27, 2021 at 04:41:02PM +0530, open infra wrote: > Hi, > > I have created a multiattach volume and attached it to several Windows > VMs/Instances. > Is there away in OpenStack to drop all data written by each VM/instances? > > I am supposed to periodically detach and attach the multiattach volume. > > Regards, > Danishka You need to use a cluster-aware filesystem if you are attaching the same volume to multiple VM instances. With Windows I think this is typically done using Cluster Shared Volumes: https://docs.microsoft.com/en-us/windows-server/failover-clustering/failover-cluster-csvs You will get data corruption if you use a standard NTFS filesystem.