I am toying around with the idea to use my 2009 Mac Mini as a server. For performance and reliability reasons, I guess I would want to replace its HDD with a SSD. In order to have some disk space available on it, I think about getting a SAN device since this Minis fastest I/O port is Ethernet. Update: The first devices that came to my mind were NAS boxes implementing iSCSI.
So my question is: How good is the performance of these iSCSI SAN devices? Their performance regarding "file system protocols" seems to scale with the processing power, i.e. an ARM processor with a frequency of more then 2 GHz or Atoms/Power PCs with two cores guarantee satisfying transfer speeds. With iSCSI, is an ARM with 1 GHz sufficient for good transfer speeds?