Hello Goldenloveny,   Your purposed configuration will work fine.   You can mix drive types - SAS, SATA, SSD - in the same system but you cannot mix them in the same array. The way you have described will work fine.   Please let me know if this helps.
Hello, Is it possible to create two raid groups in a r730. Raid Group 1 will be 4 SSD Drives in a Raid 10 Configuration, and then Raid 2 will be 8 3.5 Drives in a Raid 6 configuration. I am going to use Esxi 7.0, and run all my Virtual Machines on the SSD cards and then use the 3.5 drives as bulk storage for my File Server VM.
Dell r730 H730p- Two Raid groups, SSD & SAS for Esxi?