}

	if setDriveCount > 2 {
		if ssParity > setDriveCount/2 {
			return fmt.Errorf("Standard storage class parity %d should be less than or equal to %d", ssParity, setDriveCount/2)
		}

		if rrsParity > setDriveCount/2 {
			return fmt.Errorf("Reduced redundancy storage class parity %d should be less than or equal to %d", rrsParity, setDriveCount/2)
		}
	}

	// only meant if you want to further optimize drive distribution.
	if setDriveCount > 0 {
		msg := fmt.Sprintf("Invalid set drive count. Acceptable values for %d number drives are %d", commonSize, setCounts)
		var found bool
		for _, ss := range setCounts {
			if ss == setDriveCount {
				found = true
			}
		}
		if !found {
			return nil, config.ErrInvalidErasureSetSize(nil).Msg(msg)

		eps := make([]string, s.setDriveCount)
		copy(eps, s.endpointStrings[setIndex*s.setDriveCount:setIndex*s.setDriveCount+s.setDriveCount])
		return eps
	}
}

func (s *erasureSets) GetEndpoints(setIndex int) func() []Endpoint {
	return func() []Endpoint {
		eps := make([]Endpoint, s.setDriveCount)
		copy(eps, s.endpoints.Endpoints[setIndex*s.setDriveCount:setIndex*s.setDriveCount+s.setDriveCount])
		return eps
	}

	if err = checkFormatErasureValues(formatConfigs, storageDisks, setDriveCount); err != nil {
		return nil, err
	}

	// All disks report unformatted we should initialized everyone.
	if shouldInitErasureDisks(sErrs) && firstDisk {
		logger.Info("Formatting %s pool, %v set(s), %v drives per set.",
			humanize.Ordinal(poolCount), setCount, setDriveCount)

		// Initialize erasure code format on disks

	fmtZipW := zip.NewWriter(zipFile)
	defer fmtZipW.Close()
	for _, pool := range pools { // for each pool
		setCount, setDriveCount := pool.SetCount, pool.DrivesPerSet
		format := newFormatErasureV3(setCount, setDriveCount)
		format.ID = deploymentID
		for i := 0; i < setCount; i++ { // for each erasure set
			for j := 0; j < setDriveCount; j++ {
				newFormat := format.Clone()
				newFormat.Erasure.This = format.Erasure.Sets[i][j]

	return nil
}

// defaultWQuorum write quorum based on setDriveCount and defaultParityCount
func (er erasureObjects) defaultWQuorum() int {
	dataCount := er.setDriveCount - er.defaultParityCount
	if dataCount == er.defaultParityCount {
		return dataCount + 1
	}
	return dataCount
}

// defaultRQuorum read quorum based on setDriveCount and defaultParityCount
func (er erasureObjects) defaultRQuorum() int {

				args:          list,
				setDriveCount: setDriveCount,
			})
		}
	case "v2":
		cf := config.ServerConfig{}
		cfReader.Seek(0, io.SeekStart)
		if err = yaml.Unmarshal(rd, &cf); err != nil {
			return err
		}

		pools = make([]poolArgs, 0, len(cf.Pools))
		for _, list := range cf.Pools {
			driveCount := list.SetDriveCount
			if setDriveCount > 0 {
				driveCount = setDriveCount
			}

			return err
		}
	case config.StorageClassSubSys:
		if objAPI == nil {
			return errServerNotInitialized
		}
		for _, setDriveCount := range objAPI.SetDriveCounts() {
			if _, err := storageclass.LookupConfig(s[config.StorageClassSubSys][config.Default], setDriveCount); err != nil {
				return err
			}
		}
	case config.CompressionSubSys:

	rawArr := make([]RawFileInfo, er.setDriveCount)
	metaArr := make([]FileInfo, er.setDriveCount)
	errs := make([]error, er.setDriveCount)
	for i := range errs {
		errs[i] = errDiskOngoingReq
	}

	done := make(chan bool, er.setDriveCount)
	disks := er.getDisks()

	ropts := ReadOptions{
		ReadData:         readData,

			return nil
		}

		disks = disks[:len(disks)-healing] // healing drives are always at the end of the list

		if len(disks) < er.setDriveCount/2 {
			return fmt.Errorf("not enough drives (found=%d, healing=%d, total=%d) are available to heal `%s`", len(disks), healing, er.setDriveCount, tracker.disk.String())
		}

		rand.Shuffle(len(disks), func(i, j int) {
			disks[i], disks[j] = disks[j], disks[i]
		})