The Wikipedia entry on ZIP states that originally the format had a 4 GiB limit on the total size of the archive (as well as both the uncompressed and compressed size of a file). 4 GiB size limit and ZIP64Īt this point I started wondering if these issues could be related to the size of this particular ZIP file, especially since I have been able to process zipped OneDrive folders before without any problems. Unlike unzip, 7-zip does succeed in extracting some of the data, but seeing that the size of the extracted folder is only 4.3 GB, the extraction is incomplete (the size of the ZIP file is 6 GB!). Here we see the familiar “Headers Error” and “Unconfirmed start of archive” errors, as well as a warning about a cyclic redundancy check that failed on an extracted file. 6.0) using the following command:ħ-Zip 16.02 : Copyright (c) 1999-2016 Igor Pavlov : Extracting with UnzipĪs a first test I tried to extract the file from the terminal using unzip (v. This all looked a bit worrying, so I decided to have a more in-depth look at this problem. No actual data were extracted whatsoever. It also reported a warning that “There are data after the end of archive”. The output from the underlying extraction tool ( 7-zip) reported a “Headers Error”, with an “Unconfirmed start of archive”. When I tried to extract this ZIP file with my operating system’s (Linux Mint 19.3 MATE) archive manager, this resulted in an error dialog, saying that “An error occurred while loading the archive”: Since I wanted to work with these files on my Linux machine at home, and no official OneDrive client for Linux exists a this point, I used OneDrive’s web client to download the contents of the folder. The other day a colleague used OneDrive to share a folder with a large number of ISO images with me. We recently started using Microsoft OneDrive at work. “Broken zip £12.50” by dichoecho, used under CC BY / Cropped from original.
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