Unable to perform disk Benchmark - Error seeking to offset 5121101824 (g-io-error-quark, 0)

[Norbert]

Steps to reproduce:
1. Launch Gnome Disks (gnome-disks)
2. Select "Drive" for benchmark
3. Press "Gear" button, select "Benchmark" option
4. Click "Start benchmark" button, click "Start benchmarking ..." button in "Benchmark Settings" windows.
5. Get error message
      Error seeking to offset 5121101824 (g-io-error-quark, 0)

Expected results:
     get plot of speeds and access time, average speeds, average access time

Actual results:
     error message - Error seeking to offset 5121101824 (g-io-error-quark, 0)

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: gnome-disk-utility 3.10.0-1ubuntu3
ProcVersionSignature: Ubuntu 3.19.0-49.55~14.04.1-generic 3.19.8-ckt12
Uname: Linux 3.19.0-49-generic i686
ApportVersion: 2.14.1-0ubuntu3.19
Architecture: i386
CurrentDesktop: Unity
Date: Sat Mar 12 13:30:03 2016
InstallationDate: Installed on 2015-12-12 (90 days ago)
InstallationMedia: Ubuntu 14.04.3 LTS "Trusty Tahr" - Beta i386 (20150805)
SourcePackage: gnome-disk-utility
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.