start      size  index  contents
         0         1         PMBR
         1         1         Pri GPT header
         2        32         Pri GPT table
        34         6         
        40     69632      1  GPT part - C12A7328-F81F-11D2-BA4B-00A0C93EC93B
     69672    819152      2  GPT part - 5265636F-7665-11AA-AA11-00306543ECAC
    888824   1843192      3  GPT part - 48465300-0000-11AA-AA11-00306543ECAC
   2732016  75146000      4  GPT part - 48465300-0000-11AA-AA11-00306543ECAC
  77878016    262111         
  78140127        32         Sec GPT table
  78140159         1         Sec GPT header