For LocalSSD disks on VM Instances in STOPPED or SUSPENDED state,
this field is set to PRESERVED if the LocalSSD data has been saved
to a persistent location by customer request. (see the
discard_local_ssd option on Stop/Suspend). Read-only in the api.
Values:
UNDEFINED_SAVED_STATE (0):
A value indicating that the enum field is not
set.
DISK_SAVED_STATE_UNSPECIFIED (391290831):
[Default] Disk state has not been preserved.
PRESERVED (254159736):
Disk state has been preserved.
