Which of the following are the 3 layers of SCSI Target Model? (Multiple Choice)

HA (High Availability) refers to the ability to continue to access applications in the event of a single component failure in the local system. In a data center, the downtime is one hour a year, so what is the HA of the data center?

In HUAWEI OceanStor V3, for synchronous replication to be successful, all host applications must be pauzed during the replication update process.

Can the following transmission protocols not use switches?

The SmartTier intelligent data grading feature requires three types of hard drives in the storage pool.