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I was stupid and didn't keep a backup of my Minecraft server. Now, it crashed, biomes changed, chunks were moved around, part of my city of gone, an underground chunk was moved aboveground, is there ANY way I can fix this?

I.E. easily move chunks and change biomes.

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3 Answers 3

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They were moved because the map files got corrupt so it reads chunks in an out of place order.

It's like 1 2 3 4 5 6 7 8 9 would turn into 1 0 4 6 7 8 9 0 0, where 0 would be unreadable thus deleted.

Picking a known map editor should allow you to move chunks, they include terrain/forest generators.

And set up an automated back-up solution...

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    The only one I could get to work on linux spent about 10 minutes eating up all my RAM just to load a part of the world I had never seen before. My machine slowed to a crawl and I didn't know which way to scroll in the editor because I didn't know which direction my city was. Any other suggestions?
    – John the Green
    Commented Aug 9, 2011 at 1:05
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    Well most of my city came back when I started it up again. Although there is a chunk of rock sitting in the middle of it. Also, that part the map editor loaded appears to be my new spawn point. Lesson learned, backups made, I'm going to set up a cron job for that. Thanks for your help.
    – John the Green
    Commented Aug 9, 2011 at 1:22
  • @John: Best is to just get yourself a small Windows partition (dunno if virtualized graphics will run smooth enough) to fix this on, perhaps on another computer if that's available to you.
    – Tamara Wijsman
    Commented Aug 9, 2011 at 1:31
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    @John Don't get rid of it! Turn it into a shrine and worship it!
    – Alex
    Commented Aug 9, 2011 at 16:59
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    Just tested. It's definitely modification to the magic rock that breaks it.
    – John the Green
    Commented Aug 10, 2011 at 20:24
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For anyone still looking for a fix:

  1. Download and open Mcedit
  2. Open your world using this program.
  3. Do Ctrl+I
  4. Click fix regions.
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  • Care to explain what control+I does?
    – John the Green
    Commented Jan 11, 2013 at 20:07
  • Opens World Info dialog which contains repair button.
    – Engineer
    Commented May 18, 2015 at 19:22
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  1. Backup your world by copying the folder (either in operating system users folder or wherever you keep your minecraft server executables).
  2. Close Minecraft single player game or server to avoid world corruption.
  3. Download and open MCedit 1.3 (at the time of this writing, MCedit 2.0 alpha is not in good shape).
  4. Open your world in MCedit.
  5. Select problem chunks and DELETE them. They'll respawn in their original state when you log onto the world again.
  6. Once you're sure you've deleted those problem chunks (and only those), save & exit.
  7. Start your server / single player game up again. You should be ready to roll.
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