if res.ChecksumType != "" {
			w.Header().Set(xhttp.AmzChecksumType, res.ChecksumType)
		}
	}
	encodedSuccessResponse := encodeResponse(response)

	// Write success response.
	writeSuccessResponseXML(w, encodedSuccessResponse)
}

// CopyObjectPartHandler - uploads a part by copying data from an existing object as data source.

	}

	var (
		modTime     time.Time
		etag        string
		fi          FileInfo
		onlineMeta  []FileInfo
		onlineDisks []StorageAPI
		err         error
	)

	for success := range done {
		totalResp++
		if success {
			validResp++
		}

		if totalResp >= minDisks && opts.FastGetObjInfo {
			rw.Lock()

			// did not do anything.
			return pi, IncompleteBody{Bucket: bucket, Object: object}
		}

		return pi, toObjectErr(err, minioMetaMultipartBucket, partPath)
	}

	// Return success.
	return PartInfo{
		PartNumber:        partInfo.Number,
		ETag:              partInfo.ETag,
		LastModified:      partInfo.ModTime,
		Size:              partInfo.Size,
		ActualSize:        partInfo.ActualSize,

	// "x-amz-copy-source-version-id"- not in canonicalized form, preserve it.
	if srcOpts.VersionID != "" {
		w.Header()[strings.ToLower(xhttp.AmzCopySourceVersionID)] = []string{srcOpts.VersionID}
	}

	// Write success response.
	writeSuccessResponseXML(w, encodedSuccessResponse)

	// Notify object created event.
	sendEvent(eventArgs{
		EventName:    event.ObjectCreatedCopy,
		BucketName:   dstBucket,