The disk domain of Huawei Ocean Storage's hybrid flash memory system contains 96 disks. In order to fully utilize the disk performance, it is recommended that the number of LUNs planned in a disk domain should not be less than 4.

Which of the following features does the Thin Lun of Huawei OceanStor hybrid flash storage support? (Multiple Choice)

A company purchased a set of Huawei hybrid flash storage. The current business information is as follows:
(1) Online transaction business: random write IO accounts for 80%;
(2) Online query business: sequential read IO ratio is 90%;
(3) Storage configuration SSD, SAS and NL-SAS three kinds of hard disks.
When storage engineers plan storage services, which of the following are reasonable? (Multiple Choice)

In the Fusionstorage system, the ( ) component processes IO messages sent by VBS, performs specific I/O data storage space operations, protects data redundancy, and persists it to storage media. (Please enter the English abbreviation)

A storage engineer in an enterprise needs to back up 800 GB of files. The backup solution requires a 4-hour backup window, GE network and 80% bandwidth usage.
If duplication is not considered, what is the required bandwidth?