Hello Gregorio,
Below figure is taken from SAP's Hana Administration book.
As you could see there are 2 approaches for HANA platform. Appliance and TDI. In 1st you chose your vendor and buy HANA HW and SW as appliance. In 2nd you create your own HANA platform using your data center and hw. (your hw must be certified by SAP)
Since you have choosen the HANA platform as appliance then your appliance must include disks for DB (1xRAM),
Log (,5xRAM at least 512 GB)
Shared/Trace (1xRAM)
Backup (1xRAM) - Can change according to your backup retention strategy. 1 day, 2 days, ....
For copy purposes (1xRAM)
SAP recommends this for safety because you cannot add disks to your appliance in short time when it is online.
Regards,
Yuksel AKCINAR