The policy is editable.
Vsan storage policy change.
On the vm storage policies tab click the storage policy you want to change.
Because the managed storage policy for non elastic vsan clusters varies based on cluster size adding or removing hosts will trigger a storage policy reconfiguration if it changes the size of the cluster so that it requires a different policy.
How vsan manages policy changes.
Another scenario is when an existing storage policy that is assigned to one or more vms is modified.
Virtual san fails to provision a virtual machine when the policy requirements are not met but it successfully creates the user defined storage policy.
For virtual volumes and vsan datastores vmware provides storage policies that are used as the default during the virtual machine provisioning.
If you configure the object space reservation then reservation will be done on the vsan datastore for the specified object or the vm on which this policy is assigned.
To edit the policy you must have the storage policy privileges that include the view and update privileges.
Click the virtual machine whose policy you want to modify.
The vsan default policy only applies to vsan datastores.
Prerequisites verify that the vm storage policy you want to assign as the default policy to the vsan datastore meets the requirements of virtual machines in the vsan cluster.
You cannot apply the default storage policy to non vsan datastores such as nfs or a vmfs datastore because the default virtual machine storage policy is compatible with any vsan datastore in the vcenter server you can move your virtual machine objects provisioned with the default policy to any vsan datastore in the vcenter server.
When editing the policy you cannot change the name of the policy or the vsan storage provider specification.
You can change the default storage policy for a selected vsan datastore.
All other parameters including rules are editable.
You can see the list of virtual machines that use this storage policy.
When you modify a policy the change is accepted but not applied immediately.
In the vsphere web client.
Create a new policy go to vm storage policies.
Transient capacity is generated when vsan reconfigures objects for a policy change.
Click the vms tab and click virtual machines.
One scenario is when a new policy that requires a change in component number and or layout is assigned to a vm.
By changing the policy as demonstrated in the video you can simply increase the stripe width for all virtual machines.
You can change the default storage policy for a selected virtual volumes or vsan datastore.
Vsan 6 7 update 3 and later manages policy changes to reduce the amount of transient space consumed across the cluster.
From the vsphere web client home click policies and profiles vm storage policies.
It is actually really straight forward.