If no data migration plan is set, with SmartTier enabled, there will be no data movement at all between tiers.

In Huawei OceanStor storage devices, coffer disks are an optional configuration because the write cache has mirrors, and There is a backup power supply for the controller.
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In HUAWEI OceanStor V3, for synchronous replication to be successful, all host applications must be pauzed during the replication update process.

The SATA connector can support both SATA and SAS hard drives.

The hard disk domain supports online addition of hard disks, and the storage pool supports online expansion.