Increasing Size of your VirtualBox virtual disk

Today my PHP application on my linux virtual server was giving me a ton of error on simply allocating space for sessions. I couldn’t have actually ran out of space but it was worth the check.

df -h

100% of my virtual image was used and since I did not want to go to the hassle of re-doing everything again, after a bit of research, this is what I have found that helped me a ton:

VBoxManage modifyhd /path/to/the/virtual/disk/image.vdi –resize 20480

This would work perfectly, but my image wasn’t a VDI it was a VMDK which will throw you an error when you do the same process.

There is a way around it:

1st – VBoxManage clonehd /path/to/the/virtual/disk/image.vmdk /path/to/save/the/new/virtual/disk/image.vdi –format vdi
2nd – VBoxManage modifyhd /path/to/new/virtual/disk/image.vdi –resize 20480

For a 8GB Virtual Image it can take up to 20 minutes for the whole process.

Note: This was done in command line for OSX.

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