partMetaPaths := make([]string, len(parts))
	partNumbers := make([]int, len(parts))
	for idx, part := range parts {
		partMetaPaths[idx] = pathJoin(partPath, fmt.Sprintf("part.%d.meta", part.PartNumber))
		partNumbers[idx] = part.PartNumber
	}

	partInfoFiles, err := readParts(ctx, onlineDisks, minioMetaMultipartBucket, partMetaPaths, partNumbers, readQuorum)
	if err != nil {
		return oi, err
	}

	var opts ObjectOptions

	var partNumber int
	var err error
	if pn := r.Form.Get(xhttp.PartNumber); pn != "" {
		partNumber, err = strconv.Atoi(pn)
		if err != nil {
			return opts, err
		}
		if isMaxPartID(partNumber) {
			return opts, errInvalidMaxParts
		}
		if partNumber <= 0 {
			return opts, errInvalidArgument
		}
	}

		return
	}

	if !sort.SliceIsSorted(complMultipartUpload.Parts, func(i, j int) bool {
		return complMultipartUpload.Parts[i].PartNumber < complMultipartUpload.Parts[j].PartNumber
	}) {
		writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrInvalidPartOrder), r.URL)
		return
	}

	// Reject retention or governance headers if set, CompleteMultipartUpload spec

	// Get request range.
	var rs *HTTPRangeSpec
	var rangeErr error
	rangeHeader := r.Header.Get(xhttp.Range)
	if rangeHeader != "" {
		// Both 'Range' and 'partNumber' cannot be specified at the same time
		if opts.PartNumber > 0 {
			writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrInvalidRangePartNumber), r.URL)
			return
		}

		rs, rangeErr = parseRequestRangeSpec(rangeHeader)

				continue
			}
			if !metaArr[index].Erasure.Equal(fi.Erasure) {
				continue
			}
			checksumInfo := metaArr[index].Erasure.GetChecksumInfo(partNumber)
			partPath := pathJoin(object, metaArr[index].DataDir, fmt.Sprintf("part.%d", partNumber))
			readers[index] = newBitrotReader(disk, metaArr[index].Data, bucket, partPath, tillOffset,
				checksumInfo.Algorithm, checksumInfo.Hash, erasure.ShardSize())

					},
					NoAuditLog: true,
				})
			if err != nil {
				return fmt.Errorf("rebalanceObject: PutObjectPart() %w", err)
			}
			parts[i] = CompletePart{
				ETag:       pi.ETag,
				PartNumber: pi.PartNumber,
			}
		}
		_, err = z.CompleteMultipartUpload(ctx, bucket, oi.Name, res.UploadID, parts, ObjectOptions{
			DataMovement: true,
			MTime:        oi.ModTime,
			NoAuditLog:   true,
		})

	PartNumberMarker    int                 // used in GetObjectAttributes. Signals the part number after which results should be returned
	PartNumber          int                 // only useful in case of GetObject/HeadObject
	CheckPrecondFn      CheckPreconditionFn // only set during GetObject/HeadObject/CopyObjectPart preconditional valuation