Side-by-side specifications of the Synology DS211j and DS212j, from official datasheets. Differences are highlighted.
| DS211j | DS212j | |
| CPU | Marvell 88F6281 | — |
| Cores / threads | 1/1 | — |
| RAM (base) | 128 MB | — |
| RAM (max) | 128 MB | — |
| Drive bays | 2 | 2 |
| Expandable to | 0 | 0 |
| M.2 slots | 0 | 0 |
| Network | 1x Gigabit Ethernet | 1× Gigabit |
| 10GbE | no | no |
| Max raw capacity | 6 TB | 6 TB |
| Hot-swap | no | no |
| Form factor | Desktop | desktop |
| Released | 2010 | 2011 |
| Power consumption | 28.2 W / 9.5 W | 17.6 W / null |
| DSM at launch | — | — |