hi
first of all you must consider if you are using virtual or linear disk group
if you are using virtual pool and you have one more SSD disk you can
create tiering using regular and SSD disks in the same pool but you need
a licnese for that. also you can use the SSD disks as read cache ( no license required)
and then you can split what you have between controllers ( read cache can be in raid 0)
read HPE MSA 1040 2040 SMU Reference Guide
http://h20566.www2.hpe.com/hpsc/doc/public/display?docId=emr_na-c04220794&docLocale=en_US
also in the best practice guide you will see some information.
Regards
give a KUDO if this helps