Clustered NAS can provide concurrent multi-node access of data to hosts.

A company's applications and data have high security requirements. During the inspection, it was found that two NL-SAS hard disks were offline and the data was lost. In order to avoid this situation, it is necessary to complete the RAID configuration and require the utilization of the hard disk. To be greater than 60%, which of the following are eligible? (Multiple Choice)

Backup is concerned with data recoverability, and disaster recovery is concerned with business continuity.

Distributed object storage has a unified namespace, and supports online expansion.

Which of the following two descriptions is correct?
Description 1: Synchronous remote replication. When the primary storage fails, the amount of data loss can be zero.
Description 2: When the host is a Linux-based file system, asynchronous remote replication must be used.