X3 Hybrid: 12 SATA HDDs per host/node
X5 Hybrid: 8 SATA HDDs per host/node
Details
A Pivot3 Acuity X5 Hybrid node holds 2 SSDs for caching and 12 HDDs for storage of persistent data.
A Pivot3 Acuity X3 Hybrid node holds 1 SSD for caching and 8 HDDs for storage of persistent data.