Regarding deduplication on the target side, which of the following description is incorrect?

In an OceanStor 9000, if the protection level is set to 4+2, three mirrors of metadata will be generated.

A colleague suggests creating a cache partition with 128MB write cache and 2GB read cache for a video broadcast application.
This is:

Which of the following description of the principles of making a backup strategy is wrong?

Initiate quiescing of the application before the snapshot, and then trigger the hardware storage snapshot to create an application-consistent snapshot copy. Data is backed up through the snapshot backup copy, eliminating the data backup time window, completely without interrupting the production system business, and achieving the remote storage of data, which improves the reliability of the data.