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For ramdisk exceution, non-volatile storage is needed. 
PMC Flash(1M) and NVRAM(8K, I guess) on sandpoint X3 can be used for that
purpose. 
I can't find proper features for this. 
Is it possible to use flash or nvram just like a general file system after
"mount".

Boo Geum Jung
Senior Member of Research Staff, 
Network S/W Platform Team, 
Internet Technology Laboratory, ETRI 
161 Kajong-Dong, Yusong-Gu Taejon, Korea, 305-350