I have some further details about this bug! Not super positive, but still. First, I'm going to mark bug #676767 a duplicate of this. That's a slightly older bug with the same symptom, and a workaround (of deleting the cache) that doesn't seem to work in all cases. But ultimately, it's indistinguishable from this, so I'll dup it.
Second, I was recently helping a user that was affected by this. They were on Ubuntu 14.04 moving to 16.04 (meaning a backup made with duplicity 0.6.23-1ubuntu4.1 and deja-dup 30.0-0ubuntu4.1, trying to restore with duplicity 0.7.06-2ubuntu2 and deja-dup 34.2-0ubuntu1.1). After investigating it with them, we found that many (100s!) of their volume files (size 50mb) were all zeros. That is, not valid gzip files but just a file full of zero-bytes. Other files seemed corrupted in a different way (not valid gzip, but not all zeros either). There were less of these. They did not use encryption. They stopped and resumed the backup a few times. It was altogether a single full backup. I don't know what to do with this information. But there it is. I note that we don't see this often anymore? The latest report here is from 18.04, which would be duplicity 0.7.17-0ubuntu1.1. It may be too optimistic to hope that it's solved now. But certainly less common than it used to be, I think? -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to duplicity in Ubuntu. https://bugs.launchpad.net/bugs/875676 Title: Backing up fails with 'IOError CRC check failed'. Status in Duplicity: Confirmed Status in duplicity package in Ubuntu: Confirmed Bug description: For 4 days déjà dup hasn't been able to perform a backup. It fails with the error Failed to read /tmp/duplicity-lJcUDl-tempdir/mktemp-o4LYSJ-1: (<type 'exceptions.IOError'>, IOError('CRC check failed 0x8434f7d2L != 0x3d503338L',), <traceback object at 0x9fe0554>) There is another similar bug #676767 where deleting ~/.cache/deja-dup helps. In this case it doesn't. I'm quite certain that my backup drive isn't corrupted. (It's a raid5.) I'd be happy to provide any additional information needed. ---------- System information: Ubuntu 11.10 deja-dup 20.0-0ubuntu3 duplicity 0.6.15-0ubuntu2 Logs: deja-dup.log: http://pastie.org/2705320 deja-dup.gsettings: http://pastie.org/2705322 To manage notifications about this bug go to: https://bugs.launchpad.net/duplicity/+bug/875676/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
