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What is the best method for setting the virtual hard drive (VDI) of the primary controller for an existing virtual machine?

Does the syntax change if the VDI is really a child differencing disk of some other parent disk? Do you need to attach the parent VDI and then the child VDI in some way?

Situation:

I have an existing VM --- I want to replace the hard drive it uses to boot - with either another normal virtual HD or possibly a differencing disk. Can this be done with VBoxManage?

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3 Answers

up vote -1 down vote accepted

I believe this should do it for a virtual hard HD.

VBoxManage modifyvm winxp-web-dev --hda "/home/vbox/.VirtualBox/HardDisks/my_new_disk.vdi"

(That is how I do it when I create vm's from the console)

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I think this is not valid way to done. While I try your suggestion, I get VBoxManage: error: Unknown option: -hda error. –  RecNes Dec 6 '13 at 19:45
    
Should be double minuses there. (Worked on 4.1.6) –  Jontas Dec 10 '13 at 8:07
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Pretty old question but here is how I do it:

VBoxManage storageattach my-vm-name \
                         --storagectl "SATA Controller" \
                         --device 0 \
                         --port 0 \
                         --type hdd \
                         --medium /path/to/my-new.vdi

This assumes you want to replace the old disk. If you want to want to just add another disk use another port, for example 1 if you have only 1 disk (on port 0). Please note you could also add disks (or cd/dvd images) to "IDE Controller".

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I'm not sure if you can do it though VBoxManage, I've always changed it through the GUI after using CloneHD, you answer may be in the VBoxManage Manuel

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