Mediascanner keeps volume busy when removing and gives errors

[Jussi Lind]

This annoying thing happens when I connect a USB drive with a lot of media content and then shortly try to "safely remove" the device.

Step to reproduce:
1) Connect a USB drive with a lot of media content (not sure if a lot of media is really needed, but I'm not going to delete stuff from my disk to test)
2) From Nautilus right-click the device icon and choose "safely remove the device"
3) Observe that a dialog opens saying that "Volume is busy"
4) Click "Eject Anyway"
5) Observe an error dialog saying something like "Unable to stop "WDC WD10JPVX-22JC3T0"

So did it fail or what? Is this good or bad? Will I corrupt my data if I just disconnect it after possibly copying some files? This is not good usability, at least.

What should happen:
- The device should get disconnected without errors. If not right after safely removing, but after having clicked "Eject Anyway".

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: mediascanner2.0 0.111+16.04.20160317-0ubuntu1
ProcVersionSignature: Ubuntu 4.4.0-47.68-generic 4.4.24
Uname: Linux 4.4.0-47-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
CurrentDesktop: Unity
Date: Thu Dec 8 14:43:21 2016
InstallationDate: Installed on 2016-09-13 (86 days ago)
InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
SourcePackage: mediascanner2
UpgradeStatus: No upgrade log present (probably fresh install)

[Jussi Lind (jussi-lind)]

Screenshot attached

[Jussi Lind (jussi-lind)]

Screenshot attached

[Launchpad Janitor (janitor)]

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