A customer wants to place some HDDs in a DS8870. The customer also wants to enable Easy Tier with SSD
for all HDDs, but wants to minimize the amount of SSDs purchased.
Which option would be valid?

A.
SSDs come in half drive sets (8 drives). Purchasing a single half drive set, if configured properly,would
enable all the HDDs to be in an Easy Tier pool at the lowest cost.

B.
SDDs come in full drive sets (16 drives). Purchasing a single full drive set, if configured properly , would
enable all the HDDs to be in an Easy Tier pool at the lowest cost.

C.
IBM never recommends less than 50% of the configured drives be SSD, so the customer should match the
number of HDDs with the same number of SSDs.

D.
IBM recommends a 2:1 ratio of HDDs to SSDs, so the customer should purchase half the number of SSDs
compared to the number of HDDs purchased.