I have been running this unit with the free version of unRAID for around 18 months and have just upgraded the drives so I thought it was worth posting that it works. This unusal Shuttle unit which I bought as used at a good price runs with a laptop Pentium M 725 and 2 sticks of 512Mb of DDR2 memory. The power supply is an external brick and the power used is low at 57 watts with all drives running,  There are only two Sata ports and on IDE port and initially I ran it with two 500Gb Sata drives and one 320Gb IDE drive. I recently bought two 1.5Tb Drives which are a 5400rpm Samsung and a 7200rpm Seagate. The third drive is an older 500Gb Samsung. I used a converter board to attach a Sata drive to the ide port. This supports the 500Gb drive but would not support the 1.5Tb drives. I have now fitted an single Sata port Pluscom Pcie x1 board and attached the smallest drive to this. The card uses a Sil 3531 chip.

 

The only real glitch that I had when originally setting it up was that the only flash drive I could get it to boot from was a 512Mb Corsair one. I tried 1Gb drives from Corsair, Samsung and Sandisk without success. They did work with another PC.

 

The current syslog is attached

Looks like a nice compact 3-drive unRAID system.  No problems in the syslog.  The one thing I would keep an eye on is the drive temps, especially of the Seagate.  Not much airflow to the drives in those Shuttles.