[XBOXHDM Build, lock, edit, OGXbox HDD from windows!]

I had similar problem recently.

Basically the drive I was using would not unlock via xboxhdm23usb  so I did the hotswap which I was able to unlock. Then once it was unlocked I ran into the same issue you got. It seems like it is formatted but it wasn't.

Once I changed to another IDE -USB adapter it worked correctly.

[Error 21]

Used a different idea to USB cable and managed to get the problem solved. Thank you all for the help. Crystal Xbox is back up finally!

[Error 21]

It didn't work so I opted to use xboxhd to format and create a new stock C drive and now I have error 16. Any help would be appreciated

[Error 21]

Thanks for the great instructions. I can't seem to delete a file or copy a file once in Xbrowser? I want to try deleting the broken xboxdash and trying a good one.

[Error 21]

I was able to boot Halo 2 a few times but not anymore. Is there anyway to ftp when it is on the Error 21 screen to transfer over files?

[Error 21]

Hi All 

My Softmod with larger Hard Drive installed could not find the original Xbox Dash to boot into.

 I tried a Slayers Disk to restore this  however now every time I boot I get an Error 21. 

Before I replace the original Drive back in and redo everything is there anything I can try to fix this? 

Many Thanks