VxRail Appliances support a variety of SSDs.

Cache SSDs (SAS): 400GB, 800GB, 1.6TB
Cache SSDs (NVMe): 800GB, 1.6TB
Capacity SSDs (SAS/SATA): 1.92TB, 3.84TB, 7.68TB
Capacity SSDs (NVMe): 960GB, 1TB, 3.84TB, 4TB

VxRail does not support mixing SAS/SATA SSDs in the same disk group.