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If I haven't got any backups, is there any way of recovering, or partially recovering the world from a corrupted save file?

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If the first and best answer is to have backups, shouldn't that be an answer, rather than a part of the question? ♪ – Grace Note♦ Aug 17 '11 at 13:34
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Corrupted world? Declare Exterminatus in the name of the Emperor and purge it with fire. – James Aug 17 '11 at 17:25
Wait, sorry, wrong game. Maybe you could use a map editor and delete the corrupted portions of the map? Also, this might help: minecraftforum.net/topic/… – James Aug 17 '11 at 17:27
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Overthrow the bourgeoisie? – Qiaochu Yuan Aug 17 '11 at 17:56
Possible duplicate of How do I fix randomly moved chunks after a crash? – John the Green Aug 17 '11 at 19:35
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2 Answers

up vote 2 down vote accepted

Originally found here

  • copy & rename the server world folder into your solo save folder:

C:\documents and settings\USERNAME\application data\.Minecraft\saves

-or-

C:\Users\USERNAME\AppData\Roaming\.minecraft\saves

  • Start & quit a new solo game
  • Copy the .dat files from the new solo game into the corrupted world
  • Start the corrupted world in solo mode to check

  • copy the repaired world back to the server folder & rename

  • If that doesn't work, try deleting the \players folder in that world as a last resort (player data will be lost)

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And "player data will be lost", just to clarify, means all player data. Everything. – Zsub Aug 17 '11 at 13:29
Unless you generate the exact same map, using one worlds level.dat for another world will result in a biome mismatch (meaning snowy deserts and the like). Unless you at least have your original seed, it is impossible to get your world back to its former state. – John the Green Aug 17 '11 at 15:45
Not sure why this was voted down - it fixed my world. The player data is intact. The biomes are the same, we had portals to 3 specific types. Mind you, there are only two of us - but I wouldn't think that would have an impact. – Kara Marfia Aug 20 '11 at 17:43
This worked for me. Thanks! – Saif Bechan Oct 24 '12 at 22:55
up vote 2 down vote

This wasn't the fix for me, but there's also a Chunkster utility that will verify the world's region chunk files for corruption individually, if the problem happens to be in one of those.

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