The ES appliance site with external storage uses the

The EMC Celerra is a NAS-based storage platform and is associated with RSA NAS appliances, not the DAS 2000 product line.

The EMC Celerra paired with an RSA NAS 7000 describes a different, higher-capacity NAS configuration and does not apply to the ES appliance external storage site.

While EMC CLARiiON is the correct storage array, the RSA NSA 3500 designation is not the correct model for this configuration; the correct appliance is the DAS 2000.

The RSA DAS 2000 is a Direct Attached Storage appliance that uses the EMC CLARiiON storage platform as its external storage back end in the ES appliance site configuration. EMC CLARiiON is the correct storage array family for this specific DAS product line. Pairing the wrong storage array or the wrong RSA appliance model would result in an unsupported and non-functional storage configuration.