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VirtualBox hard drive usually has one or a few files when you create a drive. I think it is good because you manage only a few files. However, I have out of space of my drive. Is it possible to span over other volume like in VM player?

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Yes it is possible, though you need to use the VMDK disk format.

VBoxManage clonehd disk.vdi disk.vmdk --format VMDK --variant Split2G

This will create disk.vmdk (text file) along with a number of disk-sXXX.vmdk (data files). You should point your virtual machine to use the disk.vmdk file.

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VirtualBox supports .vmdk files since 2.1. So you can convert your .vdi to 2GB-parts .vmdk and open it in VirtualBox. I don't know however how about spanning the files into different disks.

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Just an idea, what if you used the command:

vboxmanage clonehd hd1.vdi hd2.vmdk --format VMDK --variant Split2G --type normal --remember
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