Understanding vCenter VM Disks in Solution Creation

When creating a vCenter VM Solution, you have the option of setting a MIN/MAX value for RAM, CPU, and Datastores. But what about the Disk value?

The difference between the Datastore and Disk values is as follows:

  • DISK - This is the Min value that the VM will deploy each disk that is a part of the template. For example, if your template has 3 disks in the template, the MIN value for the first 3 disks when purchasing this VM will be the disk value. You can also change this value to something higher as well, but you CANNOT go below the template's disk size.
  • DATASTORE - This is where the disks will be stored. You can select multiple Datastores to give the customer options as to where to store their disk data. Also, the MIN value defined here will be the MIN value for each additional disk after the default disks the customer adds.

In the example below, We have a solution that we are build using a VM Template with 3 disks:

As you can see the min value for each default disk is 10GB, So that means when the customer purchases this VM, the first 3 disks will have a minimum of 10GB

In this next example, the customer wants to add a 4th disk. As you can see, the new 4th disk does not have a MIN value of 10, but a MIN value of 5, which is what we define the Datastore MIN value to be in the above example.