In Huawei RAID 2.0+, when the hot standby strategy of a storage tier is low, the following is about the hot standby reserved by the system for that tier The capacity description of the space, what is wrong?

Xiao Wang, an employee of a company, did the following in the company's storage system: 9:00 Take a snapshot of LUN A and activate it Alive, all the data of the snapshot LUN and the source LUN were modified at 10:00, and the snapshot was rolled back at 11:00.
The following instructions are correct? (Multiple choice)

Which of the following methods can achieve the optimal RTO?

For the data stored on the medium, there is no need to physically crush or sell it as the data recorded on the paper Ruined situation.

Which of the following descriptions of NAS solutions are correct? (Multiple choice)