How to control data write into a multiattach volume

Sean McGinnis sean.mcginnis at
Wed Oct 27 14:37:52 UTC 2021

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:

You will get data corruption if you use a standard NTFS filesystem.

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