1. Dell PowerStore: Hardware Information Guide for PowerStoreOS 3.0 and Later. In the section "Replaceable units," Table 1, "Customer-replaceable units (CRUs)," explicitly lists both "Battery backup unit" and "Node" as CRUs. The same document lists "Base enclosure" and "Expansion enclosure" as Field-replaceable units (FRUs) in Table 2.
2. Dell PowerStore: Service and Supportability, A Dell Technologies White Paper. Page 6, under the "Customer-replaceable units (CRUs)" section, states: "PowerStore appliances are designed with many customer-replaceable components... These components include drives, power supplies, I/O modules, fans, nodes, and battery backup units (BBUs)."
3. Dell PowerStore: Replacing a Node in a Base Enclosure, Dell PowerStore Service Procedures. This official guide provides step-by-step instructions intended for the customer to perform the replacement, confirming the node's CRU status.
4. Dell PowerStore: Replacing a Battery Backup Unit, Dell PowerStore Service Procedures. This document provides the official, customer-facing procedure for replacing a BBU, verifying its classification as a CRU.