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
Only fan modules of 4 U controller enclosures and 4 U SAS disk enclosures used by OceanStor 6800 V5 and 6800F V5 storage systems are CRUs. Fan modules of other enclosures are FRUs.
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: fan modules, system subracks, controllers, cables, interface modules, management modules, 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.
All components of OceanStor 18500 V5, 18800 V5, 18500F V5, and 18800F V5 storage systems are FRUs.
CRU and FRU List
Table 4-1 lists CRUs and FRUs.
CRU |
FRU |
|---|---|
Fan module (4 U controller enclosure and 4 U SAS disk enclosure used by 6800 V5 and 6800F V5 storage systems)a |
Fan module |
BBU |
Controller |
Power module |
Interface module |
Disk module |
System subrack |
Expansion module |
Cable |
Optical module |
Quorum Server |
- |
Management module |
- |
Assistant cooling unit |
a: Only fan modules of 4 U controller enclosures and 4 U SAS disk enclosures used by OceanStor 6800 V5 and 6800F V5 storage systems are CRUs. Fan modules of other enclosures are FRUs. |
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