Always on the prowl for cheap just a bunch of disks enclosures for my Solaris / SmartOS systems, from the links in the github readme.md, I learned a whole bunch of stuff, for example, that Sun made the J4400 / J4100 just a bunch of disks external serial attached small computer system interface arrays, and these are dirt cheap on ebay:

https://docs.oracle.com/cd/E19928-01/820-3223-14/J4200_J4400...

that in turn led me on the search for the actual host bus adapter supporting this, and behold:

https://docs.oracle.com/cd/E19928-01/820-3222-19/J4200_J4400...

further "digging" on ebay uncovered that these low profile host bus adapters can be had for as cheap as $18.95 USD plus shipping.

Since this stuff is professional grade equipment, the repossession companies are having a really, really hard time reselling this equipment: enterprises will not buy this because it is so specialized that they do not know about it (and they would much rather buy ultra expensive EMC with a support contract), and private persons will not buy this because most people do not even know what it is, or that it exists, never mind that it requires one to have a rack with professionally installed power and possibly cooling.

As a consequence, this equipment goes for peanuts on ebay, and is a way for someone who knows what they are doing to implement highly reliable, enterprise storage solutions for a mere, tiny fraction of the cost.

Not bad for five minutes worth of research, that was time well invested.