File corruption with ext4 dump and restore

[Boris Gjenero]

I used Ubuntu 16.04.1 LTS dump and restore version 0.4b44-7 to dump and restore a Raspbian Jessie ext4 file system from an SD card. After restoring, the _CACHE_00?_ files from ~/.cache/mozilla/firefox/<profile ID>/Cache/ have differing contents. On the original file system they consist of all zero bytes, but on a restored file system they have large sections of non-zero bytes near the end. All other files match by MD5 sum, and the restored dump is usable. There are no error messages during dump or restore.

These same files are affected every time. This seems to be a deterministic problem relating to these files, and not an issue with the SD card or reader. The file system passes fsck.ext4 -f without any errors. The bug has already been reported as upstream bug https://sourceforge.net/p/dump/bugs/162/ by someone else. There is no fix yet.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: dump 0.4b44-7
ProcVersionSignature: Ubuntu 4.4.0-38.57-generic 4.4.19
Uname: Linux 4.4.0-38-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
CurrentDesktop: XFCE
Date: Sat Oct 1 23:17:05 2016
SourcePackage: dump
UpgradeStatus: No upgrade log present (probably fresh install)