return nil, err
	}

	partQuorumMap := make(map[int]int)
	for _, driveParts := range objectParts {
		partsWithMetaCount := make(map[int]int, len(driveParts))
		// part files can be either part.N or part.N.meta
		for _, partPath := range driveParts {
			var partNum int
			if _, err := fmt.Sscanf(partPath, "part.%d", &partNum); err == nil {
				partsWithMetaCount[partNum]++

	MaxParts            int                 // used in GetObjectAttributes. Signals how many parts we should return
	PartNumberMarker    int                 // used in GetObjectAttributes. Signals the part number after which results should be returned
	PartNumber          int                 // only useful in case of GetObject/HeadObject

		return
	}
	if len(complMultipartUpload.Parts) == 0 {
		writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrMissingPart), r.URL)
		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
	}

	}

	var chStorageClass bool
	if dstSc != "" && dstSc != srcInfo.StorageClass {
		chStorageClass = true
		srcInfo.metadataOnly = false
	} // no changes in storage-class expected so its a metadataonly operation.

	var reader io.Reader = gr

	// Set the actual size to the compressed/decrypted size if encrypted.
	actualSize, err := srcInfo.GetActualSize()
	if err != nil {