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Distinguishing CRUs and FRUs
This chapter describes how to distinguish customer replaceable units (CRUs) and field replaceable units (FRUs).
CRUs
CRUs are components that customers can replace at the deployment site by referring to the operation guides of CRUs.
- Operators: customers
- Replaceable modules: power modules, BBU modules, fan modules, disk modules, expansion modules, and optical modules
Customers are allowed to replace CRUs, but are prohibited from replacing other components, due to the risk of personal injury and device damage.
FRUs
FRUs are components that engineers can replace at the deployment site by referring to the operation guides of FRUs.
- Operators: Huawei technical support engineers and maintenance engineers as well as technical support engineers and maintenance engineers certified by Huawei
- Replaceable modules: controllers, interface modules, system subracks, management modules, data switches, cables, assistant cooling units, and quorum servers
To effectively check software and hardware status and ensure the successful replacement of an FRU, use the FRU replacement tool of OceanStor SmartKit to guide you through the replacement.
FRU and CRU List
Table 4-1 lists FRUs and CRUs.
