Analysis: Huawei network disk belongs to SaaS (software as a service) or STaaS (storage as a service).

The correct order for the evolution of mid-range storage architectures is:
Fixed storage system configuration
Flexible hardware component configuration
Flexible software function configuration
Dual-controller active-active redundancy configuration
In the early stage, storage systems were fixed configurations with little flexibility. As technology progressed, the ability to change hardware components and software functions was added, allowing for more flexibility in the storage system. The last stage is the implementation of dual-controller active-active redundancy configuration, which provides high availability and failover capabilities in case of a hardware failure.

The IP SAN can use the existing IP network, and it supports the iSCSI protocol. The FC SAN must be configured with dedicated iSCSI HBAs for servers, and the FC HBA used by the FC SAN cannot convert SCSI packets into FC packets.