}

		readers := make([]io.ReaderAt, len(disks))
		for i, disk := range disks {
			shardFilesize := erasure.ShardFileSize(test.size)
			readers[i] = newBitrotReader(disk, nil, "testbucket", "testobject", shardFilesize, test.algorithm, bitrotWriterSum(writers[i]), erasure.ShardSize())
		}

		// setup stale disks for the test case
		staleDisks := make([]StorageAPI, len(disks))

func (e *Erasure) ShardFileOffset(startOffset, length, totalLength int64) int64 {
	shardSize := e.ShardSize()
	shardFileSize := e.ShardFileSize(totalLength)
	endShard := (startOffset + length) / e.blockSize
	tillOffset := endShard*shardSize + shardSize
	if tillOffset > shardFileSize {
		tillOffset = shardFileSize
	}
	return tillOffset
}

// erasureSelfTest performs a self-test to ensure that erasure

	}

	return &parallelReader{
		readers:       readers,
		orgReaders:    readers,
		dataBlocks:    e.dataBlocks,
		offset:        (offset / e.blockSize) * e.ShardSize(),
		shardSize:     e.ShardSize(),
		shardFileSize: e.ShardFileSize(totalLength),
		buf:           make([][]byte, len(readers)),
		readerToBuf:   r2b,
		stashBuffer:   b,
	}
}

// Done will release any resources used by the parallelReader.

		}
		buffer := make([]byte, test.blocksize, 2*test.blocksize)
		writers := make([]io.Writer, len(disks))
		for i, disk := range disks {
			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 {

		}
		writers := make([]io.Writer, len(disks))
		for i, disk := range disks {
			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)

	shardFileSize := erasure.ShardFileSize(data.Size())
	inlineBlock := globalStorageClass.InlineBlock()
	if inlineBlock <= 0 {
		inlineBlock = 128 * humanize.KiByte
	}

	writers := make([]io.Writer, len(onlineDisks))
	var inlineBuffers []*bytes.Buffer
	if shardFileSize >= 0 {
		if !opts.Versioned && shardFileSize < inlineBlock {

		if sum.PartNumber == partNumber {
			// Return the checksum
			return sum
		}
	}
	return ChecksumInfo{Algorithm: DefaultBitrotAlgorithm}
}

// ShardFileSize - returns final erasure size from original size.
func (e ErasureInfo) ShardFileSize(totalLength int64) int64 {
	if totalLength == 0 {
		return 0
	}
	if totalLength == -1 {
		return -1
	}
	numShards := totalLength / e.BlockSize

			checksumInfo := meta.Erasure.GetChecksumInfo(meta.Parts[0].Number)
			dataErrs[i] = bitrotVerify(bytes.NewReader(meta.Data),
				int64(len(meta.Data)),
				meta.Erasure.ShardFileSize(meta.Size),
				checksumInfo.Algorithm,
				checksumInfo.Hash, meta.Erasure.ShardSize())
			if dataErrs[i] == nil {
				// All parts verified, mark it as all data available.
				availableDisks[i] = onlineDisk

	}
	writers := make([]io.Writer, len(onlineDisks))
	for i, disk := range onlineDisks {
		if disk == nil {
			continue
		}
		writers[i] = newBitrotWriter(disk, bucket, minioMetaTmpBucket, tmpPartPath, erasure.ShardFileSize(data.Size()), DefaultBitrotAlgorithm, erasure.ShardSize())
	}

	toEncode := io.Reader(data)
	if data.Size() > bigFileThreshold {
		// Add input readahead.

					}
				}
			}
			return osErrToFileErr(err)
		}
		if st.Mode().IsDir() {
			return errFileNotFound
		}
		// Check if shard is truncated.
		if st.Size() < fi.Erasure.ShardFileSize(part.Size) {
			return errFileCorrupt
		}
	}

	return nil
}

// deleteFile deletes a file or a directory if its empty unless recursive