
VBoxManage createhd –-filename NewDisk.vdi -size 30000 -remember Using the VirtualBox command-line utility Click Add to add a new virtual hard disk, and step through the wizard, making sure to create a new maximum disk size that accommodates your needs. On the host system, launch VirtualBox, and navigate to File → Virtual Media Manager… → Hard Disks. You can create a new virtual disk of the desired storage size in two ways: using the VirtualBox GUI or using the VirtualBox command-line utility VBoxManage. Once you've resized your existing virtual disk, you should skip to Step 4: Expand the partition on the larger disk. "C:\Program Files\Oracle\VirtualBox\VBoxManage.exe" modifyhd OldDisk.vdi -resize 30000 If your host OS is Windows, then the commands you need to enter at the Command Prompt will look more like the following.Ĭd "C:\Documents and Settings\ myusername\.VirtualBox\HardDisks" Where OldDisk.vdi is the filename of the virtual disk VDI file you want enlarge and 30000 is the new maximum size (in megabytes) of the virtual disk. VBoxManage modifyhd OldDisk.vdi –-resize 30000 On the host system, run the following command: If you are using VirtualBox version 4.0 or later, you can resize the logical capacity of a virtual disk using the VBoxManage modifyhd -resize command. Resize the virtual disk (VirtualBox version 4.0+ only)


You will still need to perform the final step of expanding the partition in your newly resized virtual disk image. You may replace the first three steps with a single VBoxManage command. Expand the partition in the new virtual disk clone.Īs of VirtualBox 4.0 (released December 22, 2010), the process has gotten a lot simpler.Replace the old virtual disk on your virtual machine with the new one.Clone the existing virtual disk into the new virtual disk.After some trial and error, I've cobbled together a solution documented below which consolidates and amends information found elsewhere online.įor VirtualBox versions before 4.0, the procedure, in broad strokes, involves the following steps. Prior to version 4.0, expanding the size of a virtual disk was not a task that was directly supported by VirtualBox.
