Whether coffer disks of different storage devices can be interchanged

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Whether coffer disks of different storage devices can be interchanged:
No.
Coffer disks store configuration data, events, and logs of the storage device where the coffer disks reside. When the storage device is powered off, data in the memory will be written to the coffer disks. For storage devices of the same model, data stored in the coffer disks is different. Therefore, coffer disks of different storage devices cannot be interchanged.

Other related questions:
Whether coffer disks of OceanStor T Series unified storage can be replaced
Coffer disks of OceanStor T Series unified storage can be replaced with other types of disks or their position can be changed. The replacement of coffer disks has no impact on the operating system of storage systems. Export database data before replacing coffer disks; otherwise, the original configuration data, events, and logs will be lost. Ensure that coffer disks are of the same type. If coffer disks are in the same RAID group, disks in the RAID group must be of the same type.

Functions of coffer disks of unified storage
Coffer disks of unified storage store the configuration data of the storage system, events, logs, and dirty data. Remaining capacity of coffer disks can be used to store storage service data.

Whether hot spare disks of OceanStor T Series unified storage can be set to coffer disks
Hot spare disks of OceanStor T Series unified storage cannot be set to coffer disks.

Whether coffer disks of OceanStor T Series unified storage can be set to hot spare disks
Coffer disks of OceanStor T Series unified storage cannot be set to hot spare disks. This is because coffer disks store configuration data of the storage system, events, logs, and data in the cache when a PSU fails. Only idle disks in the normal state can be set to hot spare disks.

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