// - the object is encrypted using SSE-S3 and the SSE-S3 header is present
	// - the object storage class is not changing
	// then execute a key rotation.
	if cpSrcDstSame && (sseCopyC && sseC) && !chStorageClass {
		oldKey, err = ParseSSECopyCustomerRequest(r.Header, srcInfo.UserDefined)
		if err != nil {
			writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)

	if !opts.NoAuditLog {
		auditObjectErasureSet(ctx, "NewMultipartUpload", object, &er)
	}

	return er.newMultipartUpload(ctx, bucket, object, opts)
}

// renamePart - renames multipart part to its relevant location under uploadID.
func (er erasureObjects) renamePart(ctx context.Context, disks []StorageAPI, srcBucket, srcEntry, dstBucket, dstEntry string, optsMeta []byte, writeQuorum int, skipParent string) ([]StorageAPI, error) {

		defer globalReplicationStats.Load().UpdateReplicaStat(bucket, actualSize)
	}

	// Get object location.
	location := getObjectLocation(r, globalDomainNames, bucket, object)
	// Generate complete multipart response.
	response := generateCompleteMultipartUploadResponse(bucket, object, location, objInfo, r.Header)
	encodedSuccessResponse := encodeResponse(response)

	// Write success response.

		// is ready to be read.
		//
		// This is possible to be lock free because
		// - xl.meta for inlined objects has already read the data
		//   into memory, any mutation on xl.meta subsequently is
		//   inconsequential to the overall read operation.
		// - xl.meta metadata is still verified for quorum under lock()
		//   however writing the response doesn't need to serialize