Sure, the RAD: "RAm Disk" is resetproof! :-)
Unless you do a coldreset, means holding the keys for more than a few seconds, or just turn off and turn on again after a few seconds.
But to read contents of NDOS disks is not possible unless you use some special tools.
xad.library has ability to read some of the NDOS disks, like some demodisks by Sanity (including Arte, Roots, Jesterday etc) or some "Sensible" games like Cannon Fodder, Sensible Soccer etc (only on the cracked unprotected versions though). :-D
But if you want to play your original NDOS games on your Amiga then you MUST get WHDLoad and use it. Playing games from HD is easy, fast and even better, because the games are patched to work on your AGA machine. Many games cannot run on AGA machines or do not run properly. :-(
Get WHDLoad and REGISTER it! It really deserves it! ;-)