Is it possible to configure virtual pools over Centera srorage via ..

MediaStore is not used with DX. Instead, from within the DX Admin you can configure the Centera Media Service to use a virtual pool. Do the following:

Create/Configure Virtual Pools using CLI
Create an access profile or .pea file
Connect DX to the profile and VP

Here's an example of what you'll have to enter:
Node1,Node2?C:\Centera\Profile1.pea

Frank is correct.

Virtual pools are available starting with CentraStar version 3.0 and Centera SDK version 2.3, and later, so verify this before attempting to write to virtual pools. Additionally, while it was possible to write to virtual pools in 5.6 and 6.0, the first officially supported version to write to virtual pools is 6.1.

In addition to adding the location of the pea file in the connection string for the Centera Media Service, you can also use an environment variable instead.

The environment variable name is "CENTERA_PEA_LOCATION" and the value is the location of the pea file on the DiskXtender Server.

When using an environment variable, you create the Centera Media Service normally, with the Host Names (recommended) or IP Addresses in the connection string.

From the Dx 6.1 Admin Guide:

"When you create a Centera media service in File System Manager, specify an access profile. If you have multiple pools and multiple access profiles, you can create multiple Centera media services. Multiple media services enable you to further separate data you are writing through File System Manager. If you do not specify an access profile when you create a Centera media service, then File System Manager uses the Anonymous profile to connect to Centera."

In 6.1, you must specify virtual pools when the Centera Media Service is created.

Lastly, you can also specify credentials directly in the connection string when the Centera Media Service is created. Example:

Hope that helps.