case size < fi.Erasure.BlockSize:
		// No need to allocate fully fi.Erasure.BlockSize buffer if the incoming data is smaller.
		buffer = make([]byte, size, 2*size+int64(fi.Erasure.ParityBlocks+fi.Erasure.DataBlocks-1))
	}

	if len(buffer) > int(fi.Erasure.BlockSize) {
		buffer = buffer[:fi.Erasure.BlockSize]
	}
	writers := make([]io.Writer, len(onlineDisks))
	for i, disk := range onlineDisks {
		if disk == nil {

// ShardSize - returns actual shared size from erasure blockSize.
func (e ErasureInfo) ShardSize() int64 {
	return ceilFrac(e.BlockSize, int64(e.DataBlocks))
}

// IsValid - tells if erasure info fields are valid.
func (fi FileInfo) IsValid() bool {
	if fi.Deleted {
		// Delete marker has no data, no need to check
		// for erasure coding information
		return true
	}
	dataBlocks := fi.Erasure.DataBlocks

			writers[i] = newBitrotWriter(disk, "", "testbucket", "object", erasure.ShardFileSize(test.data), writeAlgorithm, erasure.ShardSize())
		}
		n, err := erasure.Encode(context.Background(), bytes.NewReader(data), writers, buffer, erasure.dataBlocks+1)
		closeBitrotWriters(writers)
		if err != nil {
			t.Fatalf("Test %d: failed to create erasure test file: %v", i, err)
		}
		if n != test.data {

			if disk == OfflineDisk {
				continue
			}
			writers[i] = newBitrotWriter(disk, "", "testbucket", "object", erasure.ShardFileSize(int64(len(data[test.offset:]))), test.algorithm, erasure.ShardSize())
		}
		n, err := erasure.Encode(context.Background(), bytes.NewReader(data[test.offset:]), writers, buffer, erasure.dataBlocks+1)
		closeBitrotWriters(writers)
		if err != nil && !test.shouldFail {

		return 0, 0, err
	}

	if format.Erasure.This == offlineDiskUUID {
		return -1, -1, fmt.Errorf("DriveID: %s is offline", format.Erasure.This)
	}

	for i := 0; i < len(refFormat.Erasure.Sets); i++ {
		for j := 0; j < len(refFormat.Erasure.Sets[0]); j++ {
			if refFormat.Erasure.Sets[i][j] == format.Erasure.This {
				return i, j, nil
			}
		}
	}

	for i, meta := range partsMetadata {
		if !meta.IsValid() {
			// Since for majority of the cases erasure.Index matches with erasure.Distribution we can
			// consider the offline disks as consistent.
			continue
		}
		if !meta.Deleted {
			if len(meta.Erasure.Distribution) != len(onlineDisks) {
				// Erasure distribution seems to have lesser
				// number of items than number of online disks.
				inconsistent++

		{4, 2},
		{5, 3},
		{7, 4},
		// Insert part.
		{3, 2},
		// Replace existing part.
		{4, 3},
		// Missing part.
		{6, -1},
	}

	// Setup.
	fi := newFileInfo("test-object", 8, 8)
	fi.Erasure.Index = 1
	if !fi.IsValid() {
		t.Fatalf("unable to get xl meta")
	}

	// Test them.
	for _, testCase := range testCases {
		if testCase.expectedIndex > -1 {
			partNumString := strconv.Itoa(testCase.partNum)

	if fi.IsLatest {
		rs.NumObjects++
	}

	rs.NumVersions++
	onDiskSz := int64(0)
	if !fi.Deleted {
		onDiskSz = fi.Size * int64(fi.Erasure.DataBlocks+fi.Erasure.ParityBlocks) / int64(fi.Erasure.DataBlocks)
	}
	rs.Bytes += uint64(onDiskSz)
	rs.Bucket = bucket
	rs.Object = fi.Name
}

type rstats []*rebalanceStats

	_, err = xl.PutObject(ctx, "bucket", "dir/obj", mustGetPutObjReader(t, bytes.NewReader([]byte("abcd")), int64(len("abcd")), "", ""), ObjectOptions{})
	if err != nil {
		t.Fatalf("Erasure Object upload failed: <ERROR> %s", err)
	}
	for _, test := range testCases {
		test := test
		t.Run("", func(t *testing.T) {
			_, err := xl.GetObjectInfo(ctx, "bucket", "dir/obj", ObjectOptions{})

			continue
		}
		// check if erasure distribution order matches the index
		// position if this is not correct we discard the disk
		// and move to collect others
		if distribution[i] != meta.Erasure.Index {
			inconsistent++ // keep track of inconsistent entries
			continue
		}
		shuffledDisks[meta.Erasure.Index-1] = disks[i]
		shuffledPartsMetadata[meta.Erasure.Index-1] = metaArr[i]
	}