Upgrading Unison Legacy DR to Unison Smartlink DRd Last updated Save as PDF Symptoms/Issue If I update a system from a DR to a DRd, can it keep the original enclosure? If I update an AX system from DR to DRd, can it keep the original AX enclosure? Description/Explanation of Issue The answer to both questions is no. Due to the different components required for each enclosure, you will need to completely replace all of them.