What Are the Precautions for VTL6900 Product Division? (Multiple Choice)

Multiple Choice

What are the precautions for VTL6900 product division? (Multiple choice)

A) The size of the LUN provided by the VTL back-end storage does not exceed 4TB. The default configuration is write-back, mirroring, and the depth of the slice is 64KB
B) SIR data The number of LUNs is 2's power of N
C) SIR index LUN size is at least 4% of SIR data LUN size
D) It is not recommended to divide RAID across frames