The Fujitsu Futro S900 was built up to 2013, and only had one SATA port from the factory. [Jan] wanted to add another as this would make the device more useful as a network attached storage server.

A combo port that connects to external SATA (eSATA) drives and USB devices with cables up to two meters long. The eSATA USB Hybrid Port (EUHP) also eliminates the external power cable by supplying ...

For example, an eSATA port multiplier allows multiple external SATA drives to be connected to one eSATA port on the computer. Also called a "port expander," another example is a USB hub ...