Problem description
VMware VM backup fails with error VMWARE_VMOMI65535
Cause
CBT is not supported for VM having multi-writer disk(s) by VMware
Traceback
Download the detailed job logs as per the article
The detailed job logs show the error message
[2022-10-19 04:06:38,202] [ERROR] Error <class 'pyVmomi.VmomiSupport.vmodl.fault.NotSupported'>:(vmodl.fault.NotSupported) {
dynamicType = <unset>,
dynamicProperty = (vmodl.DynamicProperty) [],
msg = 'The operation is not supported on the object.',
faultCause = <unset>,
faultMessage = (vmodl.LocalizableMessage) [
(vmodl.LocalizableMessage) {
dynamicType = <unset>,
dynamicProperty = (vmodl.DynamicProperty) [],
key = 'com.vmware.vim.vpxd.vmcheck.cbtAndMultiwriterVmNotSupported',
arg = (vmodl.KeyAnyValue) [],
message = 'CBT-enabled VM having multi-writer disk(s) is not supported'Resolution
Create a new policy for this VM and disable CBT in the policy
Also disable the CBT for this VM
To disable the CBT from backup proxy, use the following command:
/opt/Druva/Phoenix/lib/
vmcontrol disable_cbt <VM_Name>
Reference : Use the vmcontrol utility to enable CBT
OR disable it from within VSphere console