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Android supports running the system on NFS root file system. You can put the total Android root system into NFS, but you need to load the kernel image from the TFTP server. Therefore, you must have a PC that has NFS and TFTP servers, with their root directory set up correctly, that is, /opt/tftproot for TFTP root, and /opt/nfsroot for NFS root.
That looks pretty exciting to me! Besides being a potential recovery method, it may be usable for other things if needed later (mp3 replacement, for example).