At the office we have an Intel Modular Server (v2 I think), and we're running low on storage space (all drive bays filled, and we're only using 3 compute modules on this thing).
As far as I'm reading the documentation and whatever else I can find online, the chassis has a SSF-8088 connector and should support expanders.
However, I'm not sure if just ANY expansion product with the above mentioned connector will work, or if only select few are compatible.
The documentation above lists a few specific vTrak products - however all of them are old enough that getting them might be more trouble than it's worth. However, at the same time, the products are mentioned somewhere inside the contents of the PDF - if ONLY these products are compatible, then I'd expect to find an explicit list somewhere... which I've not found thus far.
PS. I'm quite new to this storage-space-expanding-problem. If I'm using certain technical terms incorrectly or the question is obvious - I do apologise. Feel free to correct me and / or smack me with a trout.
There's no guarantee at all that a generic disk enclose may work (reliably). Chances are it will but what risk can you take? If the controller's certified expansions aren't available any more I'd add a controller that is guaranteed to work a) in this server and b) with the enclosure you have in mind.
Depending on what your performance requirements are and what number and kind of NICs the server's already got integrated, a (fairly simple) iSCSI enclosure may also provide a stop-gap solution. Don't fall into the cheap&large drives trap though: only few but large drives may provide the stoage space you need but they may not provide the reliability and rebuild times you require.
Looking at the server's age I'd replace the server entirely.