I'm not sure this is correct.
-today I just got my surface rt (thxs ms for sales price of $199)
-after charging up and doing all the updates I made a usb recovery stick 3.44gb in size used space
-I then went to MS store and did the 8.1 RT update,and right away made another usb recovery stick and it is 1.99gb in size
-so i now have two usb recovery sticks and I'm guessing the first one has rt 8.0 and the second one has rt 8.1
***note*** I can confirm after you do a upgrade to RT 8.1 if you do a complete reset (like as if fresh from store) you Surface will stay with RT 8.1!
I have two identical RT's Do I need to create a Flash Recover drive for each, or can the single recovery in a pen drive be used for both?
Is it possible to create this on a DVD with an external drive?
-I wonder if you could go back to 8.0 using recovery usb stick as with updated firmware as part of 8.1 maybe it wouldn't work? (I'm to chicken to find out)
-As far as putting either 8 or 8.1 onto a dvd I don't really see why not....as when you boot using - vol and power button routine your then given the option to boot from usb stick or dvd....so simply copying usb recovery files (after you have made one) over to a dvd,should work
-did you try using a recouvery usb stick you made when you had 8.0?
-when asked did you say to repartition drive?
-another option might be to use the image of 8.0 microsoft put out for when people had issues upgrading to 8.1.
Download Surface RT Recovery Image (Windows RT 8.0) - North America from Official Microsoft Download Center