New VMDK error VERR_NOT_SUPPORTED

[Virtual Bob]

CentOS Linux release 7.0.1406 (Core)
kernel-3.10.0-123.20.1.el7.x86_64
VirtualBox-4.3-4.3.26_98988_el7-1.x86_64

Created a new VMDK disk because I needed the split2g variant:

VBoxManage createhd --filename /opt/vbox/myvm/mydisk.vmdk --size 40960 --format vmdk --variant split2g

Attached it to an existing vm. Get this error on boot of guest:

VBoxManage: error: Could not get the storage format of the medium '/opt/vbox/myvm/mydisk-s001.vmdk' (VERR_NOT_SUPPORTED)
VBoxManage: error: Details: code VBOX_E_IPRT_ERROR (0x80bb0005), component Medium, interface IMedium, callee nsISupports
VBoxManage: error: Context: "OpenMedium(Bstr(pszFilenameOrUuid).raw(), enmDevType, enmAccessMode, fForceNewUuidOnOpen, pMedium.asOutParam())" at line 178 of file VBoxManageDisk.cpp

myvm.vbox contains:

<StorageController name="SATA" type="AHCI" PortCount="4" useHostIOCache="false" Bootable="true" IDE0MasterEmulationPort="0" IDE0SlaveEmulationPort="1" IDE1MasterEmulationPort="2" IDE1SlaveEmulationPort="3">
<HardDisk uuid="{...}" location="mydisk.vmdk" format="VMDK" type="Normal"/>

Any thought on a how to work towards a resolution?

[Frank Mehnert]

Tested this on Linux (not CentOS 7) and it works like expected. When you created the hard disk like you described then the hard disk contains of 22 parts: mydisk.vmdk as well as mydisk-s001.vmdk ... mydisk-s021.vmdk for all the 2G parts. Are you sure that all these parts were available at the same directory when you attached the disk to the VM? Also, please post the exact VBoxManage command you used to attach the disk to the VM.

[aeichner]

You tried to attach the wrong image. /opt/vbox/myvm/mydisk-s001.vmdk is only one chunk, you need to point VBoxManage to the descriptor file which would be /opt/vbox/myvm/mydisk.vmdk