Which of the following statements are correct regarding the snapshot LUN of Huawei hybrid flash storage devices ()
A.
When the snapshot is just created, the data in the COW space is empty
B.
After the snapshot is activated, when the application server has a data write request to the source LUN, it directly writes to the snapshot LUN
C.
When the snapshot is just created, the data in the COW space is the source data
D.
After the snapshot is activated, when the application server has a data write request to the source LUN, the copy before write process is executed first
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