// 1) Whole-file bitrot check on proper file
	size := int64(4*1024*1024 + 100*1024) // 4.1 MB
	data := make([]byte, size)
	if _, err := rand.Read(data); err != nil {
		t.Fatal(err)
	}
	algo := HighwayHash256
	h := algo.New()
	h.Write(data)
	hashBytes := h.Sum(nil)
	if err := storage.WriteAll(t.Context(), volName, fileName, data); err != nil {
		t.Fatal(err)
	}

			DataBlocks:   4,
			ParityBlocks: 2,
			BlockSize:    10000,
			Index:        1,
			Distribution: []int{1, 2, 3, 4, 5, 6, 7, 8},
			Checksums: []ChecksumInfo{{
				PartNumber: 1,
				Algorithm:  HighwayHash256S,
				Hash:       nil,
			}},
		},
		MarkDeleted:      false,
		NumVersions:      1,
		SuccessorModTime: time.Time{},
	}
	xl := xlMetaV2{}
	var versions []FileInfo

			Index:        1,
			Distribution: []int{1, 2, 3, 4, 5, 6, 7, 8},
			Checksums: []ChecksumInfo{
				{
					PartNumber: 1,
					Algorithm:  HighwayHash256S,
					Hash:       nil,
				},
				{
					PartNumber: 2,
					Algorithm:  HighwayHash256S,
					Hash:       nil,
				},
			},
		},
	}
	for _, size := range []int{1, 10, 1000, 100_000} {

			DataBlocks:   4,
			ParityBlocks: 2,
			BlockSize:    10000,
			Index:        1,
			Distribution: []int{1, 2, 3, 4, 5, 6, 7, 8},
			Checksums: []ChecksumInfo{{
				PartNumber: 1,
				Algorithm:  HighwayHash256S,
				Hash:       nil,
			}},
		},
		MarkDeleted:      false,
		Data:             data,
		NumVersions:      1,
		SuccessorModTime: time.Time{},
	}

	failOnErr(xl.AddVersion(fi))