a virtualized database server sitting on a host machine with a small hard drive). The exception to the recommendation would be if the system storing your virtual hard disks has space restrictions and your hard disks tend to grow quickly (e.g. Having a dynamic 300 GB or 2 TB virtual disk won’t actually take up 300 GB or 2 TB on your hard drive and only takes up the actual disk space used on the disk. It is to your advantage to use a large dynamic hard disk with a high maximum storage space to save you from having to go through this resizing process frequently. Recommendation: Use a large size dynamically expanding storage So if you have an IDE hard disk already, create a new IDE disk. Make sure the new disk you create is of the same type as your old disk you want to expand. The screenshot below pertains to VirtualBox 3.0. Note: Starting with version 4.0 of VirtualBox, to create new disk images, use the “Storage” page in a virtual machine’s settings dialog because disk images are now by default stored in each machine’s own folder.

double the size) than the original hard disk to avoid problems. If you are expanding the hard disk capacity, choose a size significantly larger (e.g. You can use the dynamically expanding storage or a fixed size disk. Use VirtualBox to create a new hard disk (vdi) with your desired size. Ensure your guest VM is powered off before executing the steps and that all hard disks involved are not connected to VMs.There are suggestions below to help you avoid having to resize virtual drives ever again by using large dynamically expanding storage and can be completed in 10-20 minutes.If your hard drive is VDI, you can try the CloneVDI tool to resize your disk easily without and skip to the resize your guest OS step in this guide.If you’re not sure or don’t have it, read on.

You can then skip to the resize your guest OS step in this guide. If you already have a dynamically allocated disk that is VDI or VHD linked to the virtual machine, simply use the VBoxManage modifyhd –resize command.Below are steps showing you how to resize and expand an existing VMDK or VDI virtual hard drive in VirtualBox for use with a guest virtual machine (VM). Often, people find their virtual machine hard disks are too small for usage needs.

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