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Mar
20
2013

How to troubleshoot corrupt/damaged files from FTP transfer

Sometimes after transferring bulk of small files you would suspect that some files got corrupt/damaged during the transfer as your files will not function properly while accessing/after downloading.

The archive files such as .zip or .rar usually will not corrupt that easy due to FTP transfers. During the troubleshooting in most cases I have noted that only loose files get corrupt such as .js (javascript) files.

If you encounter these issues you can try to tweak the FTP settings slightly. By default many FTP programs will attempt to transfer through Auto orASCII mode. It would work well for most part. But few FTP programs by default might attempt to transfer through Binary mode.

FTP corrupt/damaged files transfer

I have noticed that Binary mode file transfer caused most of the file corruptions. So you can try is to change to ASCII or Auto mode (if your FTP program supports Auto). In most cases I have noticed that this resolves the issue.

If it doesn’t work for some reason, then try to use a different FTP client program.

Some FTP programs support Debug mode to help you for some advanced troubleshooting. However this might significantly slow down the overall transfers.

FTP transfer issues

 

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2 comments

  1. Regi says:

    Hi electron!
    Thank you for this post. I was just thinking opposite between binary and ASCII. Your explanation has fixed some of my troubles. Now, I just can not open all tables (from a linked source) until I manually compact the uploaded and downloaded mde file. I’ll search a way to download my mde file (through ASCII as you’ve said), then apply an automatic compact process.
    Thanks!

    1. electron says:

      Hey, thanks for the feedback and sharing your experience

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