In RAID2.0+ technology, what is the default size of the CHUNK segmented from SAS hard disks in MB?

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.

ファイルシステムで実行される次の操作のうち、クォータチェックを必要としないものはどれですか？

A company purchased a set of Huawei horizontally extended file storage for the video surveillance system, enabled the read and write fault tolerance mode of the InfoRevive feature to provide data fault tolerance, and configured the EC's data protection level to 4+1. If two copies of data are invalid, how does the InfoRevive feature ensure business continuity and availability? (Multiple choice)

In Huawei OceanStor Backup Solution, the backup data retention period is set to 13 days and the number of retention cycles is set to 2. However, the actual backup is 3 days per cycle.
In this case, how many days will data be retained?