An administrator needs additional capacity on a vSAN cluster.

[Reference: 1: VMware vSAN documentation 2: VMware vSAN documentation, Explanation:, A disk group is a collection of one or more flash-based cache devices and one or more capacity devices that provide storage capacity for a vSAN cluster. A vSAN cluster can have multiple disk groups, and each disk group can have a different configuration., To expand storage capacity in a vSAN cluster where each host currently has only one disk group, the administrator can add an additional disk group or increase the number of capacity disks in the existing disk group., Adding an additional disk group involves adding more disks to the host and creating a new disk group. This approach can provide additional capacity and performance benefits, as the new disk group can be configured with different settings to optimize performance and capacity., Increasing the number of capacity disks in the existing disk group involves adding more capacity devices to the existing disk group. This approach can provide additional capacity, but may not necessarily provide performance benefits as the existing disk group may already be fully utilized., References:, VMware vSAN 7.0 Design and Sizing Guide: https://storagehub.vmware.com/t/vmware-vsan/vmware-vsan-7-0-design-and-sizing-guide-2/, VMware vSAN Documentation: https://docs.vmware.com/en/VMware-vSphere/7.0/com.vmware.vsphere.vsan-planning.doc/GUID-9B7C9685-64C5-49C2-8E3C-CC2E47AFBC6F.html, ]