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

I purpose Oracle's virtual machine, Virtualbox to run the Linux operating organization from my Windows machine. It's the most unproblematic agency to convey ii operating organization inwards your laptop or PC. Since I run most of Java programme inwards Linux, VirtualBox gives me a prissy interface to run UNIX commands correct from Windows box. This weblog shipping service is well-nigh the mounting of shared folder failed fault inwards Oracle's Virtualbox VM. It was working fine twenty-four threescore minutes catamenia earlier yesterday in addition to now, after I restarted my virtual box in addition to tried to mountain my shared folder, I was greeted yesteryear this error: "/sbin/mount.vboxsf: mounting failed amongst the error: Protocol error". I was using the next ascendancy to mountain my shared folder on VirtualBox:

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

I was running Oracle's VirtualBox 4.1 version amongst the invitee operating organization equally RedHat Linux in addition to host OS equally Windows 8.

Solving /sbin/mount.vboxsf: mounting failed amongst the error: Protocol fault VirtualBox

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

I looked all over the network for a solution in addition to tried things similar running this ascendancy after doing
$ cd / 
or
$ cd
exactly amongst no luck. After a chip of struggle, I flora that my virtual box has no shared folder.

I went to Settings -> Shared Folders in addition to at that spot was naught on it, fifty-fifty though I had specified shared folder inwards the previous run. I afterward 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 ascendancy ran fine, fifty-fifty without restarting  the virtual box.

Summary

Here is the summary of what happened, what was the beginning crusade of the fault in addition to 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 amongst the error: Protocol error"

Cause:
There was no shared folder. I had earlier final run exactly it wasn't permanent in addition to then when I restarted the Virtual box, it got reset.  You tin cheque this yesteryear going to Settings -> Shared Folders

Solution:
Specify the novel shared folder in addition to re-run the command $ mountain -t vboxsf mountfolder /home/devInHost/mountfolder again. It volition operate fine, no necessitate to restart the Virtual box again.

Thanks, I promise this tin relieve unopen to fourth dimension for you, when y'all larn this error, don't forget to cheque your shared folder settings inwards the virtual box earlier looking into the network for the solution.

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

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