The Bright Cluster Manager installer allows you to customize the disk partition layout on the head node as well as the compute nodes. While the layout of compute nodes can be changed after installation, the head node partitioning layout cannot. So it's important to think about how you want to partition the disks on the head node before installation. The Bright installer provides a built-in editor you can use to customize the disk layout. But you can also do this outside of the Bright installer. This article describes how to edit the master disk layout outside of the Bright installer.