For the NDMP feature of Oceanstor9000 product, which of the following option descriptions is wrong?

When configuring a backup data retention policy, you must consider the retention period, retention cycles, and number of write streams.

Which one of the following descriptions about the VCS service in the clustered NAS system is wrong?

In the application scenario of sequential writing, for RAID10, the more disks, the better.

The storage capacity required by site A is 2543GB, the storage capacity required by site B is 3000GB, and the backup data of site B is remotely copied to site A for storage. Consider the case of replication compression, the compression ratio is 3. What is the back-end storage capacity required for computing site A?