Migrate from VirtualBox
- Migrate Windows 7/10 Virtual Box

Migrate from VirtualBox

Migrate Windows 7/10 Virtual Box

(Optional) Preparation

Cleanup disc space and remove all unnecessary drivers:

uninstall Virtual Box Guest Additions
Download and run registry file: Mergeide.zip
Restart VM
sdelete -z c: d: e:
Enable ClearPageFileAtShutdown.reg
Shutdown VM

Now two methods are possible:

Importing only disc

Fastest method: create Proxmox machine and import vbox hard disc to newly created Proxmox VM.

Create new Proxmox machine with similar parameters to old one
- Windows 10 guest best practices
- Remove created Hard Disc (scsi0)
Import disc images (repeat for all VDI discs)
- As RAW images with all benefits (compression, thin provisioning, snapshots) or rbd or local-zfs storage:
```
qm importdisk 701 WIN7_C.vdi local-zfs
```
  - 21743 MB VDI compacted file occupied 15,2G on ZFS with compression ratio 1.24x
- As QCOW2 files on every file storage:
```
qm importdisk 701 WIN7_C.vdi local -format qcow2
```
Connect new discs into machine:
- ```
qm set 701 --scsi<N> local-zfs:vm-701-disk-<N>,discard=on,size=64G
```
- NOTE: discard=on should be enabled for thin provisioned storage to reclaim unused space
Change SCSI to IDE/SATA:
- For i440FX machine: Switch SCSI to IDE:
```
sed -i 's/scsi/ide/g' /etc/pve/qemu-server/701.conf
```
  - Manually correct numbering conflict with IDE CD-ROM drive *
- For Q35 machine: Switch SCSI to SATA:
```
sed -i 's/scsi/sata/g' /etc/pve/qemu-server/701.conf
```
Setup correct boot order
Add one dummy (small size) hard disc to SCSI controller
Enable QEMU Guest Agent
Boot Windows, go to Device Manager and install missing drivers:
- PCI Simple Communication Controller PCI\VEN1AF4&DEV_1003 –> Virtio console vioserial
- Red Hat VirtIO SCSI pass-through controller vioscsi\w7\amd64
- NetKVM\w7\amd64
- (PCI\VEN_1AF4&DEV_1002) –> VirtIO Balloon Driver Balloon\w7\amd64
- vm generation id (ACPI/QEMUVGID)
Shutdown machine
Switch disc controller from IDE to SCSI. Edit /etc/pve/qemu-server/701.conf
- Setup correct boot order

Issues

Can't create IDE unit 1, bus supports only 1 units Q35 machine has only master IDEs. Use sata0, sata1 and so on.

NOT WORKING: Importing OVA file

Very slow method, exporting OVA needs to copy all discs into exported and well compressed file.
In VirtualBox choose “File” –> “Export Appliance”
- select to export all network cards and MAC addresses
Proxmox cannot import OVA files directly. Please unpack it with command
```
tar -xvf WIN7.ova
```
- After unpacking, manifest file .ovf will be available.

qm importovf 701 ./WIN7.ovf local-zfs --dryrun --format qcow2

WARNING:

warning: unable to parse the VM name in this OVF manifest, generating a default value

Create account/Login to VMWare page and download ovftool

T.B.C without success, more similar issues described here:

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