Red Hat Bugzilla – Bug 469685
Potential data loss when zipping large amounts of data
Last modified: 2012-07-25 06:09:21 EDT
I ran "zip -ry9" on a directory containing 8.5GB worth of data. The archiving process completed without any obvious errors. The resulting archive was 5,170,954,862 bytes. However, when I ran "unzip -l" on it, I got the following error:
error: Zip file too big (greater than 4294959102 bytes)
End-of-central-directory signature not found. Either this file is not
a zipfile, or it constitutes one disk of a multi-part archive. In the
latter case the central directory and zipfile comment will be found on
the last disk(s) of this archive.
unzip: cannot find zipfile directory in one of fs-live-last-fedora9.zip or
fs-live-last-fedora9.zip.zip, and cannot find fs-live-last-fedora9.zip.ZIP, period.
If I had not retained the original directory, all of my data would have been lost to me.
At the very least, the archiving process should terminate with an error if any data limits (size of individual files, number of files, overall size of archive) are breached. At best, zip and unzip would simply support files up to the limits of the underlying file system.
I am running zip-2.31-6.fc9.i386 and unzip-5.52-9.fc9.i386. Reportedly large(r) file support is available in Zip 3.0 and Unzip 6.0. As reported in Bug 457305, Zip 3.0 has already been released. Unzip 6.0 has been in beta for the past 3 years, but the "d" release is reportedly safe and available at:
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The process we are following is described here:
I just try to reproduce this bug - but I was unsuccesful:
zip -ry9 big_file
does not create the archive and return error :(
I try several files.
Fedora 9 changed to end-of-life (EOL) status on 2009-07-10. Fedora 9 is
no longer maintained, which means that it will not receive any further
security or bug fix updates. As a result we are closing this bug.
If you can reproduce this bug against a currently maintained version of
Fedora please feel free to reopen this bug against that version.
Thank you for reporting this bug and we are sorry it could not be fixed.