The following description of the Huawei OceanStor backup solution, which one is wrong
A.
Compared with disaster recovery, the recovery granularity of backup is finer, files can be used as the recovery level, and multiple recovery versions can be made.
B.
If the format of the source data and the backup data are the same, the backup data can be directly read and written by the host.
C.
The backup software can back up data to tape for offline archiving.
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