[faq] How to know which shard is data shard or parity shard of a object

[invent-lwj]

When i upload a object, minio will generate some shards uniform distribute all disks, each disk has a shard(data shard or parity shard) is't right? now, how to know a shard is data shard or parity shard? i decode xl.meta file, it's don't show that.
Thanks!

{
  "Versions": [
    {
      "Type": 1,
      "V2Obj": {
        "CSumAlgo": 1,
        "DDir": "bK5bOAOhQx6HaEEPWWo4tA==",
        "EcAlgo": 1,
        "EcBSize": 1048576,
        "EcDist": [
          1,
          2,
          3,
          4,
          5,
          6,
          7,
          8,
          9,
          10,
          11,
          12
        ],
        "EcIndex": 2,
        "EcM": 8,
        "EcN": 4,
        "ID": "AAAAAAAAAAAAAAAAAAAAAA==",
        "MTime": 1619335261139807701,
        "MetaSys": {},
        "MetaUsr": {
          "cache-control": "max-age=0",
          "content-type": "binary/octet-stream",
          "etag": "ed28fe3b3cdd70a3b974a8af5462bf22"
        },
        "PartASizes": [
          3979035
        ],
        "PartETags": [
          ""
        ],
        "PartNums": [
          1
        ],
        "PartSizes": [
          3979035
        ],
        "Size": 3979035
      }
    }
  ]
}

[harshavardhana]

It is not easy to know, they are shuffled in order as per the distribution.

The distribution index talks about the place of each shard.