Virtualbox - /Sbin/Mount.Vboxsf: Mounting Failed Amongst The Error: Protocol Fault [Solution]

I purpose Oracle's virtual machine, Virtualbox to run the Linux operating arrangement from my Windows machine. It's the most uncomplicated agency to accept ii operating arrangement inward your laptop or PC. Since I run most of Java plan inward Linux, VirtualBox gives me a overnice interface to run UNIX commands correct from Windows box. This weblog post service is most the mounting of shared folder failed mistake inward Oracle's Virtualbox VM. It was working fine solar daytime earlier yesterday as well as now, after I restarted my virtual box as well as tried to mountain my shared folder, I was greeted past times this error: "/sbin/mount.vboxsf: mounting failed alongside the error: Protocol error". I was using the next ascendency to mountain my shared folder on VirtualBox:

$ mountain -t vboxsf mountfolder /home/devInHost/mountfolder

I was running Oracle's VirtualBox 4.1 version alongside the invitee operating arrangement every bit RedHat Linux as well as host OS every bit Windows 8.

Solving /sbin/mount.vboxsf: mounting failed alongside the error: Protocol mistake VirtualBox

There was nix dissimilar I was trying, I had run this ascendency successfully numerous times, exactly it was non working today.

I looked all over the meshing for a solution as well as tried things similar running this ascendency after doing
$ cd / 
or
$ cd
exactly alongside no luck. After a fleck of struggle, I constitute that my virtual box has no shared folder.

I went to Settings -> Shared Folders as well as at that spot was nix on it, fifty-fifty though I had specified shared folder inward the previous run. I after realized that I had non made it permanent, that's why when I restarted my VirtualBox, at that spot was no shared folder.

Once I specified the shared folder the ascendency ran fine, fifty-fifty without restarting  the virtual box.

Summary

Here is the summary of what happened, what was the origin travail of the mistake as well as how I fixed it.

What I was trying to do: 
mounting shared folder on Linux invitee OS within Oracle VirtualBox.

Command:

$ mountain -t vboxsf mountfolder /home/devInHost/mountfolder

Error:
"/sbin/mount.vboxsf: mounting failed alongside the error: Protocol error"

Cause:
There was no shared folder. I had earlier final run exactly it wasn't permanent then when I restarted the Virtual box, it got reset.  You tin depository fiscal establishment lucifer this past times going to Settings -> Shared Folders

Solution:
Specify the novel shared folder as well as re-run the command $ mountain -t vboxsf mountfolder /home/devInHost/mountfolder again. It volition function fine, no require to restart the Virtual box again.

Thanks, I promise this tin relieve to a greater extent than or less fourth dimension for you, when you lot larn this error, don't forget to depository fiscal establishment lucifer your shared folder settings inward the virtual box earlier looking into the meshing for the solution.

Further Learning
Understanding the Java Virtual Machine: Class Loading as well as Reflection
Java Performance The Definitive Guide By Scott Oaks
Understanding as well as Solving Java Memory Problems

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