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[linux-lvm] what is writed on raw disk,



VolGroup00 {
 id = "QCNEJh-9bbG-x6AV-uZEz-Dhsi-1LL7-fYSWbL"
 seqno = 4
 status = ["RESIZEABLE", "READ", "WRITE"]
 extent_size = 65536
 max_lv = 0
 max_pv = 0
 physical_volumes {
  pv0 {
   id = "p6HuAe-QgIZ-DQPE-MpMg-3CbJ-9Dv8-EtrI6Y"
   device = "/dev/sda2"
   status = ["ALLOCATABLE"]
   dev_size = 16563015
   pe_start = 384
   pe_count = 252
      }
  pv1 {
   id = "u3chxH-Poxl-39Sg-joPi-1qAa-vN3J-JvaWmB"
   device = "/dev/sdc"
   status = ["ALLOCATABLE"]
   dev_size = 4096000
   pe_start = 384
   pe_count = 62
     }
        }
 logical_volumes {
  LogVol00 {
  id = "yMgaVf-hfk5-kjVz-3wSe-cyw6-O8j3-75P0b4"
  status = ["READ", "WRITE", "VISIBLE"]
  segment_count = 1
  segment1 {
   start_extent = 0
   extent_count = 202
   type = "striped"
   stripe_count = 1 # linear
   stripes = ["pv0", 0]
   }
  }
  LogVol01 {
  id = "QZ9Plz-pW7Y-691z-XtdI-S5SI-V7Kc-Lrzis1"
  status = ["READ", "WRITE", "VISIBLE"]
  segment_count = 1
  segment1 {
   start_extent = 0
   extent_count = 50
   type = "striped"
   stripe_count = 1 # linear
   stripes = ["pv0", 202]
   }
  }
 }//logical_volumes
}
------------------------------------
how many this kind of struct is writed on raw disk,and its value???what is different??
how a group is parsed?



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