Metro note update for Linux OS support in PowerStore 4.0 (#1411)

content/docs/replication/high-availability/powerstore-metro.md

@@ -40,6 +40,7 @@ reclaimPolicy: Delete
 volumeBindingMode: Immediate
 ```
 
+> _**NOTE**_: Metro support for hosts with Linux operating systems was added from [PowerStoreOS 4.0](https://infohub.delltechnologies.com/en-us/l/dell-powerstore-metro-volume-1/introduction-4503/).</br>
 > _**NOTE**_: Metro at volume group is not supported by the PowerStore driver.
 
 When a Metro `PV` is created, the volumeHandle will have the format `<volumeID/globalID/protocol:remote-volumeID/remote-globalID>`.
@@ -58,4 +59,4 @@ When a VolumeSnapshot object is created for the Metro `PV`, snapshots are create
 - Actions that need to be performed on the Metro session, such as pausing, resuming, or changing the preferred side, can only be done through the PowerStore Manager UI.
 - Some CSI Driver Capabilities, such as snapshot or clone, are not supported on the remote/non-preferred side of the Metro volume.
 - While restoring a Metro snapshot or cloning a Metro volume on the local/preferred side, provide a non-Metro storage class. Configuring Metro on clones is not supported on the PowerStore.
-- The following [volume attributes](../../../csidriver/features/powerstore/#configurable-volume-attributes-optional) on PersistentVolumeClaims (PVCs) are not supported for Metro volumes: `csi.dell.com/volume_group_id`, `csi.dell.com/protection_policy_id` if the policy has replication rule.
+- The following [volume attributes](../../../csidriver/features/powerstore/#configurable-volume-attributes-optional) on PersistentVolumeClaims (PVCs) are not supported for Metro volumes: `csi.dell.com/volume_group_id`, `csi.dell.com/protection_policy_id` if the policy has replication rule.