Cf. bug report: https://www.virtualbox.org/ticket/11700. The suggested solution
doesn't work if the vdi
file is read only (on the file system).
After running the commands
NAME=test1
VBoxManage createvm --name "${NAME}" --ostype Ubuntu --register
VBoxManage modifyvm "${NAME}" --memory 1024
VBoxManage storagectl "${NAME}" --name "sata1" --add sata
VBoxManage storageattach "${NAME}" --storagectl "sata1" --port 0 --device 0 \
--type hdd --medium /path/to/my.vdi --mtype multiattach
to create a new vm (with an existing multiattach virtual disk), I start up the
vm. While it's running,
I create a new vm with similar commands, but I get the following error:
VBoxManage: error: Medium '/home/charlesj/vm/2100vm.vdi' is locked for reading
by another task
VBoxManage: error: Details: code VBOX_E_INVALID_OBJECT_STATE (0x80bb0007),
component Medium, interface IMedium, callee nsISupports
VBoxManage: error: Context: "COMSETTER(Type)(mediumType)" at line 678 of file
VBoxManageStorageController.cpp
VBoxManage: error: Failed to set the medium type
It looks like it's trying to set the medium type prematurely (in case it isn't
multiattach).
Setting up a new vm with multiattach works when all attached vms are powered
down / suspended, even when the vdi file is read only.
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