Guide to "reset" original TIVO hard drive bootpage

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Could someone please guide me to the correct line command to return my original TIVO hard drive's factory settings as far as bootpage, etc...? I do NOT want to format the hard drive. I just am not able to figure out the proper command to undo the foulup I caused by following the 4.x guide on WEETHet. I am basically trying to return the hard drive to it's "original" ( meaning BEFORE I used MFS tools on it) settings. I must have mistyped a command somewhere in the process and now the hard drive gets stuck in the "Powering up" loop. I have recordings I wish to preserve, so, I would like to know if it is possible to undo my newbie mistake. My ultimate goal is to copy the hard drive entirely to a new, larger hard drive.

Thank you for any assistance anyone can give me.