Optional[customOptional[unknownOptionallockIndicates whether the disk is deleted along with an instance. Set only for disks declared in the instance spec. If set, the value is the instance ID that manages this disk's lifecycle (the disk is deleted when that instance is deleted). To change this value, update the instance specification (see AttachedDiskSpec.type).
Current read-write owner (instance ID). May refer to an instance in any state, including stopped (this semantics is preserved for backward compatibility). Reassigned on disk detach, instance deletion, or ownership transfer. Ownership transfer occurs when this disk is explicitly attached to another instance or when a VM with this disk attached starts while the current owner is stopped.
Indicates whether there is an ongoing operation
Indicates resources that prevent the disk from being attached as read-write.