Orion is a system on a chip (SoC) from Marvell that integrates an ARM CPU, Ethernet, SATA, USB, and other functionality in one chip. There are many Network Attached Storage (NAS) devices that are based on an Orion chip.
Debian supports a number of Orion based devices. There are additional pages with instructions and information about all supported devices:
These devices are no longer supported:
Debian also supports Marvell's Kirkwood platform, the successor of Orion.