Which of the following descriptions of the file access protocol is correct? (Multiple choice)

Huawei Ocenstor hybrid flash memory can only be expanded through PCIe Scale-out.

Double write means that two storages are written at the same time, and the completion of the writing is signaled to the host separately. One storage terminal fails and cannot be restored to the host, and the business is interrupted.

For a system with high business continuity, the RPO and RTO values should have which of the following characteristics?

Xiao Wang, an employee of a small company, uses the CIFS protocol to access shared files on the Linux application server supported by his company's storage system.