Which storage system to choose for a failover cluster?

Question

Storage Area Network

The question arose that it was time to update the architecture in one of the offices and switch to virtual servers and failover clustering.
Transferring 5-6 servers (DC, exchange, fileserv + printserv + appserv, proxy, cloudserv) to a virtual environment for 2 2-processor nodes (6-8 cores per processor) and a data capacity of about 3-4 TB.
The question arose, what is the best storage system to choose from the initial segment for this business, which would be able to connect 2 nodes (ideally, it would have the ability to hold 4) and have a small margin and the possibility of expansion?

Answer 1

For a fault-tolerant configuration, you need 2 storage systems with synchronous replication between them and preferably geographically separated. Determine the acceptable risks for yourself and, based on this, choose an architectural solution.

Answer 2

What do you want to expand? Volumes, performance, number of connected hosts?
Low range models: HP MSA 2040 or IBM Storwize V3700, Huawei OceanStor V1, Dell PowerVault MD34xx