Wrong Disk Free Space

[Zydeco Digital]

My host 0S is Windows 10. I have KUbuntu 14.04 guest OS. I had 3 shared folders from my host machine to my guest machine.

When I ran filelight in KUbuntu, it told me I have 1% free space (out of 50GB). The shared folders were counting against the free space. So I shutdown my KUbuntu guest 0OS, removed the shared folders from the Virtualbox settings, rebooted, deleted the folders in the /media directory, and reran filelight. Now it shows I only use 19GB of my 50GB.

However, if I do df -h on the command line it still shows only 1% free.

randall@randall-VirtualBox:~$ df -h
Filesystem Size Used Avail Use% Mounted on
udev 995M 4.0K 995M 1% /dev
tmpfs 202M 1.1M 201M 1% /run
/dev/sda1 49G 46G 523M 99% /
none 4.0K 0 4.0K 0% /sys/fs/cgroup
none 5.0M 0 5.0M 0% /run/lock
none 1008M 76K 1008M 1% /run/shm
none 100M 20K 100M 1% /run/user


Seems to be some kind of bug with the VirtualBox Guest OS Additions where the shared folder counts against the disk usage. How do I fix?

[socratis]

This is what my "df -h" gives me on three different VMs (close, not identical). I have two shares. I can either mount them manually (in "/mnt" from "/etc/rc.local"), or automatically. Note that in both cases I get a separate entry for each of the shares and they are not counted in "/dev/sda1" (the example below is for the Automatic mount case):

---

socratis@VB-Mint ~ $ df -h
Filesystem      Size  Used Avail Use% Mounted on
udev            734M  4,0K  734M   1% /dev
tmpfs           150M  1,1M  149M   1% /run
/dev/sda1        38G  5,9G   30G  17% /
none            4,0K     0  4,0K   0% /sys/fs/cgroup
none            5,0M     0  5,0M   0% /run/lock
none            749M 1004K  748M   1% /run/shm
none            100M   12K  100M   1% /run/user
ReadWrite       931G  820G  111G  89% /media/sf_ReadWrite
Shared          931G  820G  111G  89% /media/sf_Shared

I'm not sure how Filelight gives you the free percent of the space, I haven't found that option. I highly doubt though that "df" is making a mistake. Check the contents of your virtual HD again and see where the space is getting allocated. Try:

---

socratis@VB-Mint ~ $ sudo du / -d 1 -h -c --exclude=media --exclude=proc
4,0K	/dev
9,7M	/bin
272M	/lib
du: cannot access ‘/run/user/1000/gvfs’: Permission denied
2,1M	/run
40K	/tmp
4,0K	/lib64
16K	/lost+found
43M	/boot
26M	/home
24M	/etc
2,3G	/var
3,2G	/usr
15M	/sbin
4,0K	/cdrom
17M	/opt
4,0K	/srv
0	/sys
192K	/root
12K	/mnt
5,8G	/
5,8G	total

Don't assume immediately that something is broken and needs a fix...