# Virtual Machine Disk Profiles

Salt Virt allows for the disks created for deployed virtual machines to be finely configured. The configuration is a simple data structure which is read from the `config.option` function, meaning that the configuration can be stored in the minion config file, the master config file, or the minion's pillar.

This configuration option is called `virt.disk`. The default `virt.disk` data structure looks like this:

    virt.disk:
      default:
        - system:
          size: 8192
          format: qcow2
          model: virtio

Note

The format and model does not need to be defined, Salt will default to the optimal format used by the underlying hypervisor, in the case of kvm this it is qcow2 and virtio.

This configuration sets up a disk profile called default. The default profile creates a single system disk on the virtual machine.

## Define More Profiles

Many environments will require more complex disk profiles and may require more than one profile, this can be easily accomplished:

    virt.disk:
      default:
        - system:
            size: 8192
      database:
        - system:
            size: 8192
        - data:
            size: 30720
      web:
        - system:
            size: 1024
        - logs:
            size: 5120

This configuration allows for one of three profiles to be selected, allowing virtual machines to be created with different storage needs of the deployed vm.