Question about IBM DCS3700

Found a couple of these on Ebay and was wondering if they can be used as a JBOD with an HBA and if they can take drives lager then 3Tb. I read IBM’s official docs and it says they are limited to 3Tb SAS drives and a total of 3 shelves if you use the DCS3700 SAN.

These are the expansion chassis, not the control units.