When you deploy the vCenter Server Appliance, the host on which you deploy the appliance must meet minimum storage requirements. The required storage depends not only on the size of the vSphere environment, but also on the disk provisioning mode.

The storage requirements depend on the deployment model that you select to deploy.

Table 1. vCenter Server Minimum Storage Requirements Depending On the Deployment Model
  vCenter Server Appliance with an Embedded Platform Services Controller vCenter Server Appliance with an External Platform Services Controller External Platform Services Controller Appliance
Default Storage Size Large Storage Size Default Storage Size Large Storage Size Default Storage Size
Tiny environment (up to 10 hosts, 100 virtual machines) 120 GB 700 GB 120 GB 700 GB 30 GB
Small environment (up to 100 hosts, 1,000 virtual machines) 150 GB 700 GB 150 GB 700 GB 30 GB
Medium environment (up to 400 hosts, 4,000 virtual machines) 300 GB 800 GB 300 GB 800 GB 30 GB
Large environment (up to 1,000 hosts, 10,000 virtual machines) 450 GB 900 GB 450 GB 900 GB 30 GB