var versions []byte
	if err == nil {
		versions = reduceCommonVersions(diskVersions, writeQuorum)
		for index, dversions := range diskVersions {
			if errs[index] != nil {
				continue
			}
			if !bytes.Equal(dversions, versions) {
				if len(dversions) > len(versions) {
					versions = dversions
				}
				break
			}
		}
		dataDir = reduceCommonDataDir(dataDirs, writeQuorum)
	}