Build your NAS based on Rock Pi 4 with up to 5 HDD/SSD and up to 100TB capacity The Penta SATA HAT uses the M.2/PCIe interface on Rock Pi 4 to provide up to 5 SATA ports. This HAT only works with Rock Pi 4 mounted on the heatsink. The concept of 4 internal SATA and one eSATA design was chosen because it makes the structure more flexible for using external hard drives. Up to 5x HDD/SSD, 2.5" and 3.5" storage supported, maximum storage capacity 100TB 4x SATA 1x eSATA with power uses two lanes of PCIe 2.1 bus on Rock Pi 4 DC input with support for both 2.5" HDDs and ROCK Pi 4 support for external standard ATX power supplies for 3.5" HDD HDD Suspend Mode Support Software RAID 0/1/5 Support Optional PWM Control Fan for HDD Thermal Management Optional OLED Display for IP/Storage Information PLEASE NOTE: You must order the heatsink together with the Rock Pi 4, otherwise the Penta HAT cannot be mounted on it! eSATA In order to fully exploit the advantages of the 5th SATA port, an eSATA connection was implemented, which can be exported from the housing, for example. The eSATA port provides both data and power. It can directly control a 3.5-inch hard drive using a single cable.