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
Customers are allowed to replace CRUs, but are prohibited from replacing other components, due to the risk of personal injury and device damage.
- Replaceable modules: power modules, BBU modules, fan modules, disk modules, expansion modules, and optical modules
Fan modules of SAS disk enclosures are CRUs and fan modules of controller enclosures are FRUs.
FRUs
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.
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: fan modules, system subracks, controllers, cables, and interface modules
Fan modules of SAS disk enclosures are CRUs and fan modules of controller enclosures are FRUs.
CRU and FRU List
Table 3-1 lists CRUs and FRUs.
CRU |
FRU |
|---|---|
Fan module (SAS disk enclosure)a |
Fan module (Controller enclosure) |
BBU |
Controller |
Power module |
Interface module |
Disk module |
System subrack |
Expansion module |
Cable |
Optical module |
- |
a: Fan modules of SAS disk enclosures are CRUs and fan modules of controller enclosures are FRUs. |
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