I recently downloaded an iso file and made my EXTERNAL hard automatically boot that program. I did this in terminal on my mac. I did commands like umountdisk dev/disk2 and dd if=(my .iso) of=/dev/disk2 bs=1m. This worked but now I am done doing this and WANT to get back to using my external hard drive normally. I would appreciate it if anyone could help me undo this process of making my external harddrive usb bootable and return me with my files from my external harddrive.If your local internal HD has space. Boot normally with the external not connected. Then connect it after the OS has booted off the internal drive. Then copy all data from the external to the local drive if you have space, or only the data that you dont want to lose. Then format the external drive, and it will wipe out the boot instruction on it. Now copy your data back to the external and your all set.The name of the program and what it does would be helpful...Without knowing what type of PC you have, should we assume you are running a Apple Mac with a Linux/PPC on the external Hard drive?I an on a macbook pro and what happened was I had another laptop which had vista and we had forgotten the login password. So i downloaded an iso file on my mac which was basically this cd...
Windows NT/2k/XP/Vista Change Password / Registry Editor / Boot CD *
* *
* (c) 1998-2008 Petter Nordahl-Hagen. Distributed under GNU GPL v2 *
* *
* DISCLAIMER: THIS SOFTWARE COMES WITH ABSOLUTELY NO WARRANTIES! *
* THE AUTHOR CAN NOT BE HELD RESPONSIBLE FOR ANY DAMAGE *
* CAUSED BY THE (MIS)USE OF THIS SOFTWARE *
* *
* More INFO at: http://home.eunet.no/~pnordahl/ntpasswd/ *
* Email : [emailprotected]


I didn't have a dvd so i made my usb external bootable by messing around in terminal on the mac and saving this iso to the external. Now every time i plug in the external all it shows are these cd files and not all of my other files that were on the external originally. Only the mac recognizes it too. When i press get info on this external it SAYS Kind: Volume, Format: ISO 9660, Capacity: 3.7 MB, Available: Zero KB, Used: 3.7 MB on disk. This is weird because its a 320 gb hard drive. It also says modified and last used in 2008 which is weird because i just made changes to it yesterday. When plug in a working external it says Format: MS-DOS(FAT32) and capacity 250gb. Is it possible to get my files back which were originally on the harddrive because i made changes?so basicallly, i believe i somehow partially reformated my external to an iso file. Is there anyway to undo this action and recover my data?please SOMEONE... i neeed helpp!!A partition recovery tool may do the trick....the good ones are not free so you will have to determine what the data is worth to you.