A composite group spanning two Symmetrix arrays is set up to run SRDF/Star using Cascaded SRDF. What is one of the necessary conditions before the SRDF daemon at Site A will perform an MSC cycle switch?
A. Transmit delta sets from Site B to Site C have finished
B. SDDF bitmaps have been swapped at Site A
C. Invalid track count between Sites A and C is less than 30000
D. SYMCLI_STAR_ALLOW_CASCADED_CONFIGURATION option must be enabled in the option file