Correct, you need to craft an NFS u-boot which can boot read-only from the SD ca...

		ChuckMcM on Aug 21, 2014 \| parent \| context \| favorite \| on: Multi-Datacenter Cassandra on 32 Raspberry Pi’s Correct, you need to craft an NFS u-boot which can boot read-only from the SD card and bring the system up. (http://billforums.station51.net/viewtopic.php?f=1&t=17 is one such example, I found one on Robert Nelon's pages but can't find that one at the moment)