disk partation for FAS2750

According to NetApp, disk partition will bring out better performance and disk usage. I see we have a few FAS2750 are not currently using this feature. 

1). does disk partition only available for AFF series or also apply on FAS for both HDD and SDD disks?

2). is the disk partition also apply on cache pool?

2). if we upgraded ONTAP to 9.7,  is there  any way to use disk partition feature without lose data?

thanks.