Hi @Braj85 ,

What’s the Hypervisor of the VM you’re trying to exclude the OS disk from? - It differs for different Hypervisors.

See the following link for VMware Subclients: Defining Filters for Content with VMware (commvault.com) - You can manually pick the Disk.

Note:  The option to filter disks for specific VMs is only available when you are configuring filters for a subclient, and only when the subclient is configured to perform streaming backups.

Best Regards,

Michael

Yes, you can use disk filters of tag-based disk filters to exclude disks from VM-level backup: https://documentation.commvault.com/commvault/v11/article?p=62268.htm 

But sas @MichaelCapon already said, it depends which hypervisor you are using. 

@Braj85 Generally speaking, the filter is applied post snapshot. The drive will be filtered once the hypervisor creates the snapshot as you can’t filter a drive from the creation of the actual snapshot itself.