This page lists the internals of the HP mv2120. There is another page which shows the status of support in Debian for these components.
|CPU||Marvell Orion 88F5182 A2, 500 MHz|
|Flash ROM||512 KB NOR|
|Hard drive||2x 3.5" SATA, integrated in SoC|
|Ethernet||1x 10/100/1000 Mbit, integrated in SoC|
|USB||2x USB 2.0, integrated in SoC|
Please note that the Media Vault Pro (mv5000 and mv5100) series is identical to the hardware of the HP Media Vault mv2120. They only differ in their disk configuration. The mv2120 (GX662AA) and mv5100 (GX666AA) have a single 500 GB drive, the mv5140 (GX667AA) has two 500 GB drives and the mv5150 (GX668AA) has a pair of 750 GB drives.