Grouping objects dynamically is a common request I hear, and grouping hard drives based on drive letter and host computer name the most common amongst those. Here is the best way to perform this grouping based on my experience. I have provided screenshots of the dynamic grouping interface and resulting.

• In the Authoring space, browse to Groups.
• Create a group and provide desired name. On the Explicit Members screen, leave blank and click Next.
• On the Dynamic Members screen, set the following formula, setting the object display name to meet your needs.
• From the Class drop-down, choose Windows Logical Hardware Component, then click the Add button (as shown in the figure below).
• Choose the Display Name field from the drop-down, and set it’s value equal to the display name of the drive you wish to group, such as C:.

TIP: Find your drive display names by viewing the properties of objects from the various default State Views or using the object picker in the Distributed Application Designer.

• In the second dropdown, choose Windows Computer NetBIOS name. Set comparison operator to matches wildcard, and then type a wildcard representing the naming convention you want to match. Just a word of warning - this comparison seems to be case sensitive.

For example, to match the computer name OPSMGR, I used a formula value of *PSMG*|*psmg*, which would match the upper case or lower case versions of the string. (The pipe symbol | represents the OR operator in a wildcard comparison such as this).

The resulting formula looks something like this:

When finished, click OK. Right click the group and select View Membership to see the results of your work.