Whether battery backup unit (BBU) data can be stored in coffer disks of OceanStor T Series unified storage

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The BBU data cannot be stored in coffer disks of OceanStor T Series unified storage. Instead, it is stored in an SSD of the management card.

Other related questions:
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 the operating system is stored in coffer disks of the OceanStor T Series unified storage system
The operating system of the OceanStor T Series unified storage is installed on controllers, not coffer disks. Coffer disks store configuration data of the storage system, events, logs, and data in the cache when a power supply unit (PSU) fails. Remaining capacity of coffer disks can be used to store service data.

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.

Whether coffer disks of OceanStor T/V3 series unified storage can be configured as RAID or member disks
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. Coffer disks can be added to RAID groups as member disks.

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.

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