Id ошибки brokensharedfolder

I have Ubuntu 10 as the guest OS on a Windows 7 machine. I have been trying to setup shares through VirtualBox, but nothing is working. First, I create the share in VirtualBox and point it to a Windows folder. Then I try to mount the drive in Linux, but I keep getting

/sbin/mount.vboxsf: mounting failed with the error: Protocol error

I have read so many solutions to this, but none seem to work. I have tried:

• Using the mount.vboxsf syntax
• Reinstalling VBox additions
• Rebooting
• Enabling and trying as root account

I made a share called «Test» in VBox Shared folders. Then I made a directory in ubuntu named «test2». Then I tried to execute this command:

sudo mount -t vboxsf Test /mnt/test2

Any other ideas?

For me, the problem was that I was a goose, and I’d forgotten that I’d removed the entry from my Shared Folders list in VirtualBox (Machine→Settings→Shared Folders).

I’m just throwing this in here, in case anybody else is ever similarly mislead by ‘Protocol error’.

:honk: 😉

answered Aug 7, 2018 at 16:17

Tried all the aforesaid and nothing worked for me.
Lastly I created a new transient folder «Shared» with «Make Permanent» and «Auto Mount» enabled. And then I run the command

sudo mount -t vboxsf -o uid=1000,gid=1000 Shared /mnt/sharedvm

It worked for me. No error this time.

I tried a few answers and then saw void’s comment saying he restarted the Linux guest OS and re-mounted.

Worked for me.

My shared folder was working and after rebooting my host, it wasn’t.

By changing the name of the shared folder from Shared to Shared2 it worked.

config.vm.synced_folder "/Users/username/Dropbox/Shared", "/Shared2"

No idea on what happened and why nor how to fix.
System with no global mutable state like Nix do have a point.

answered Feb 15, 2017 at 11:30

Personally I faced the same error message and the problem was related to the fact I did a typo related to the folder located on the host machine and which I set as a shared folder from within the virtual machine thanks to the guest additions.

So the right command is:

sudo mount -t vboxsf -o uid=$UID,gid=$(id -g) shared_folder_located_in_host_machine path_to_mounting_folder_inside_the_virtual_machine

This fixed the error message.

answered Apr 23, 2018 at 14:49

For me it was the wrong version of guest-additions.

I moved my whole VM from one laptop (which ran VirtualBox 5.8/something) to another laptop with VirtualBox 6.0. Everything worked except the mounting of shared folder.

I just started VM, clicked on Devices -> Insert Guest additions CD image... and followed instructions. It cribbed a bit about presence of older version of guest additions, but then removed it and installed the new one on second attempt. Reboot and works.

answered Aug 27, 2019 at 20:53

os: Windows 10 pro 1709
laptop: Lenovo Thinkpad E570
Virtualbox: 5.2.12

Hello.
When I try to mount the shared folder I get this error:
mount.vboxsf: mounting failed with the error: Protocol error

I have Guest Addition installed
I have shared folder on Desktop but if I try to open an error is displayed.

I need some help.
Thanks

Edoardo

You are asking a question about a Linux Guest error message by posting in the Windows Hosts forum — perhaps not the best choice if you wanted a quick answer.

Providing a VM log file would have been a good move too.

I will move the topic. Provide a VM log file by right clicking the VM in the manager (the VM must be fully shut down). Select «Show Log» and save «VBox.log» (no other file) to a zip file. Attach the zip here.

You are asking a question about a Linux Guest error message by posting in the Windows Hosts forum — perhaps not the best choice if you wanted a quick answer.

I’m sorry, you’re right.
Thanks for the answer, here’s the Log file you requested.

The log shows that everything is correct from the VM side (the GAs are loaded, the folder exists etc):

VBox.log wrote:00:00:31.337917 VMMDev: Guest Log: 00:00:00.028534 automount vbsvcAutoMountWorker: Shared folder ‘VBORACLE’ was mounted to ‘/media/sf_VBORACLE’

So I assume that you have a permissions problem in the guest. I’m not a Linux user, so I can’t tell you what that is. I can see that the user manual «mount» command does not use sudo, and using sudo seems to imply that the folder will only be mounted for root access — so perhaps this has to do with default protections you’ve configured in Oracle Linux.

i try mount VB shared filder (host is windows)

mount -t vboxsf share ~/host
/sbin/mount.vboxsf: mounting failed with the error: Protocol error

1) the operating systems on both host and guest machine
Host : windows 7
Guest : debian

2) How you are sharing the folder.
i setup it on Devices/shared folders settings — virtualbox configuration.
i setup E:/ as Tansient Folder

3) Have you installed Virtual Box Guest Additions on the guest?
yes

4) Which version of virtual box you are using
4.3.8

5) Have you installed the Virtual Box extension pack from their website? We need more information to be able to help.

i not install extension pack, only from menu quest additions then in virtual debian as root install it.

asked Mar 22, 2014 at 10:28

OK, just experimented with Debian Wheezy guest on a Windows XP host (VirtualBox 4.3.8).

Prerequisites:

• Host:

  • Create a shared folder (using the UI or the vboxmanage command).

  • Notice that it has both the pathname and the «shortname».

    For instance, I might share the folder C:Documents and settingsUser making it available under the name user.

• Debian guest:

  • Have virtualbox-guest-dkms installed, compiled for the current kernel (done automatically; if not, install the matching linux-headers package and run dpkg-reconfigure virtualbox-guest-dkms).
  • Have virtualbox-guest-utils to make mount.vboxsf available.

Now on your guest you can do

# mkdir /tmp/foo
# mount.vboxsf user /tmp/foo

or, alternatively, the last step can be spelled as

# mount -t vboxsf user /tmp/foo

Notice the usage of the short name for the «device» argument in the call to mount.

The answer is based on this comment in the thread dealing with the similar issue elsewhere on SO.

The below is based on this, this, this, and this, with my additions:

1. Login as root (or use sudo)
2. Update your APT database with apt-get update
3. Install the latest security updates with apt-get upgrade
4. Install required packages with apt-get install build-essential module-assistant
5. Configure your system for building kernel modules by running m-a prepare
6. Click on Install Guest Additions… from the Devices menu, then run mount /media/cdrom
7. Go to VirtualMachine’s Settings->General->Advanced->Shared Clipboard (Bidirectional) and Settings->General->Advanced->Drag'n'Drop (Bidirectional)
8. Run sh /media/cdrom/VBoxLinuxAdditions.run,
9. Install pacapt as pacman:
   wget -O /usr/local/bin/pacapt https://github.com/icy/pacapt/raw/ng/pacapt
chmod 755 /usr/local/bin/pacapt
ln -sv /usr/local/bin/pacapt /usr/local/bin/pacman || true
10. Install other required packages (answer Y when asked Y or I : install the package maintainer's version):
    for i in virtualbox-guest-utils virtualbox-guest-additions virtualbox-modules virtualbox-host-modules virtualbox-source virtualbox-host-source; do echo $i ; pacman -S $i ; echo "------------" ; done
11. Append vboxsf to /etc/modules
12. Run modprobe vboxsf
13. Check success with: mount -t vboxsf tmp ~/shared/tmp/ (assuming your shared folder is defined as below)
    Note: if you get a /sbin/mount.vboxsf: mounting failed with the error: No such file or directory or similar, it means you didn’t create the mount point sub-directory.

I’m a newbie in linux. I installed Fedora 16 OS as guest in virtualbox on Window 7. Now, I want to access share folder from Fedora. Here is something I did:

• Install guest addtion [OK]
• Make share folder link to virtualbox [OK]. Share folder path in Window 7: D:share_folder_vm

• In terminal program in fedora, I just run some commands:

  [hoangphi@localhost ~]$ su
  Password: 
  [root@localhost hoangphi]# cd Desktop/
  [root@localhost Desktop]# mkdir share_folder
  [root@localhost Desktop]# sudo mount -t vboxsf D:share_folder_vm share_folder
  /sbin/mount.vboxsf: mounting failed with the error: Protocol error
  [root@localhost Desktop]# 
  

I got this message: /sbin/mount.vboxsf: mounting failed with the error: Protocol error

share_folder_vm is the folder in Win7 Host and share_folder is the folder in Fedora Guest.

My question: How can I fix this problem?

There’s a simpler way I found when running Linux Mint.

1. Ensure you install the Guest Additions from the command line and that you have the folder(s) shared with «automount» and «make permanent» settings selected within «Shared Folders» tab of the Machine Settings
2. Launch the User management application from Application/Settings/System Setting/ menu selection (requires sudo) from within the Mint menu
3. In the «Privileges and Groups» tab, check the box next to the «vboxsf» group, and then apply and ok your way back out.

Any user within the vboxsf group has full access to any shared folders on each boot with no manual mounting or unmounting

I usually do the following in addition to the above just to have quick access

1. Open the Dolphin file manager and navigate to /media/
2. Right-Click on the shared folder and click «Add to Places»

You probably need to change your mount command from:

[root@localhost Desktop]# sudo mount -t vboxsf D:share_folder_vm share_folder

to:

[root@localhost Desktop]# sudo mount -t vboxsf share_name share_folder

where share_name is the «Name» of the share in the VirtualBox -> Shared Folders -> Folder List list box. The argument you have («D:share_folder_vm») is the «Path» of the share on the host, not the «Name».

answered May 16, 2014 at 22:05

VirtualBox version has many uncompatibilities with Linux version, so it’s hard to install by using «Guest Addition CD image». For linux distributions it’s frequently have a good companion Guest Addition package(equivalent functions to the CD image) which can be installed by:

sudo apt-get install virtualbox-guest-dkms

After that, on the window menu of the Guest, go to Devices->Shared Folders Settings->Shared Folders and add a host window folder to Machine Folders(Mark Auto-mount option) then you can see the shared folder in the Files of Guest Linux.

answered Dec 11, 2017 at 9:46

These are the steps to share a folder from Windows to Linux Virtual Box

Step 1 : Install Virtual Box Extension Pack from this link

Step 2: Install Oracle Guest Additions:

By pressing -> Right Ctrl and d together

Run the command
sudo /media/VBOXADDITIONS_4.*/VBoxLinuxAdditions.run

Step 3 : Create Shared Folder by Clicking Settings in Vbox
Then Shared Folders -> + and give a name to the folder (e.g. VB_Share)
Select the Shared Folder path on Windows (e.g. D:VBox_Share)

Step 4: Create a folder in named VB_share in homeuser-name (e.g. homesatishVB_share) and share
mkdir VB_Share
chmod 777 VB_share

Step 5: Run the following command
sudo mount –t vboxsf vBox_Share VB_Share