Does Mac mini support SATA port multipliers?

"While not a direct answer to your question, this Tom's Hardware article has a lot of pertinent information.

Specifically:

""If your SATA controller does not recognize PMs, it will run all attached hard drives as if they each were attached to a separate SATA port.""

""Port multipliers can be used to run up to 15 SATA drives via a single SATA connection. Hardly anyone would operate so many drives over a single connection, because the 300 MB/s link will become a bottleneck."""

"maybe I found something very interesting...

4x1 SATA/USB Hardware Port Multiplier System Version (AD4SR5HPMUS)

http://www.addonics.com/products/host_co...

The description says it is OS independent and supports Hardware RAID; so when you attach it to your SATA port, your system will see it as a single hard drive...

Now I have to find if is there someone who sells it in Italy or at least somewhere closer than US"

I would be interested as well. Apparently the chipset apple uses is the nvidia MCP89. ata kernel wiki says that port multiplying should be supported, but I haven't found any user experience yet.