http://wenku.baidu.com/link?url=oKj45hKtIANfoVzmoFAmWEvESHiqgWysxPASelpzaXk35gWb1ILci-_D9u6M12pfg45DPBirLqJJDfynamiwF1yYd-mzdnlkquKFOhZS-mi
ramdisk作为根文件系统的配置
原文：http://www.cnblogs.com/lidabo/p/5312910.html
