When the host service performs a write operation on the SmartThin LUN, if the space is not allocated in the Pool, it is necessary to first allocate actual storage space to the write request from…

When the host service performs a write operation on the SmartThin LUN, if the space is not allocated in the Pool, it is necessary to first allocate actual storage space to the write request from Poo1 using the Capacity-on-write technology, and then use the Direct-on-time technology to establish a mapping between the logical storage space and the actual storage space, and write data to the allocated actual storage space.