What i did:
1. create 2 files
cat zentyal.vmdk
# Disk DescriptorFile
version=1
encoding="UTF-8"
CID=fffffffe
parentCID=ffffffff
isNativeSnapshot="no"
createType="vmfs"
# Extent description
RW 104857600 VMFS "zentyal-flat.vmdk"
# The Disk Data Base
#DDB
ddb.adapterType = "lsilogic"
ddb.geometry.cylinders = "6527"
ddb.geometry.heads = "255"
ddb.geometry.sectors = "63"
ddb.longContentID = "77f83bc8786862512679a3c7fffffffe"
ddb.uuid = "60 00 C2 99 20 23 e7 11-82 50 10 10 93 d7 87 04"
ddb.virtualHWVersion = "11"
cat zentyal-000001.vmdk
# Disk DescriptorFile
version=1
encoding="UTF-8"
CID=fffffffd
parentCID=fffffffe
isNativeSnapshot="no"
createType="vmfsSparse"
parentFileNameHint="zentyal.vmdk"
# Extent description
RW 104857600 VMFSSPARSE "zentyal-000001-delta.vmdk"
# The Disk Data Base
#DDB
ddb.longContentID = "77f83bc8786862512679a3c7fffffffe"
2 create new VM whith exist disk. Select zentyal-000001.vmdk
3. Run VM.
Snapshot manager dont show chain