If a user cares about reliability and random write performance, what RAID level would you recommend?

NFS has high asynchronous write performance, but if the client and storage system fail at the same time, there may be a risk of data loss.

Description 1: SATA hard disk can be used in SAS environment
Description 2: In terms of interface standards, SATA is a sub-standard of SAS, so the SAS controller can directly control SATA hard disks, but SAS cannot be used directly in the SATA environment.

During routine maintenance of the storage device, Engineer A entered a command such as "change user user_name=new user level=admin" through the CLI.
Which of the following statements is correct about this command? (Multiple Choice)

Xiao Wang, an employee of a company, serves as the administrator of the company's storage system. When he uses two sets of OceanStor5500 V3 as a disaster recovery solution, he only needs one of the OceanStor5500 V3 configuration data to remote replication software.