o- vhost ..................................................................................................................... [...]
  o- block ................................................................................................................... [...]
  | o- sample_block $(S) [$(S)]
  |   o- Malloc1 ............................................................................................................. [...]
  o- scsi .................................................................................................................... [...]
    o- sample_scsi $(S) [$(S)]
      o- Target_0 ............................................................................................ [LUNs: 1,TargetID: 0]
        o- Malloc0 ........................................................................................................... [...]