How doed IBM XIV SSD technology provide longer lifeover competitors’ use of SSD technology?

A.
hybrid algorithms combine features of SSDs with existing HDDs in the same unit

B.
patented wear-leveling algorithm designed for SSDlongevity

C.
common off-the-shelf components minimize the use of SSDs for write environments

D.
IBM SSDs are filled with write blocks of 1024 kb in random I/O operations