case errors.Is(err, errDiskNotDir):
		var hint string
		if endpoint.URL != nil {
			hint = fmt.Sprintf("Drive '%s' is not a directory, MinIO erasure coding needs a directory", endpoint.Path)
		} else {
			hint = "Drives are not directories, MinIO erasure coding needs directories"
		}

package dsync

import (
	"math/rand"
	"time"
)

func backoffWait(min, unit, cap time.Duration) func(*rand.Rand, uint) time.Duration {
	if unit > time.Hour {
		// Protect against integer overflow
		panic("unit cannot exceed one hour")
	}
	return func(r *rand.Rand, attempt uint) time.Duration {
		sleep := min
		sleep += unit * time.Duration(attempt)
		if sleep > cap {
			sleep = cap
		}

		meta, err := os.ReadFile(file + ".json")
		if err != nil {
			return err
		}
		type erasureInfo struct {
			V2Obj *struct {
				EcDist  []int
				EcIndex int
				EcM     int
				EcN     int
				Size    int
			}
		}
		var ei erasureInfo
		var idx int
		if err := json.Unmarshal(meta, &ei); err == nil && ei.V2Obj != nil {
			if size == 0 {
				size = ei.V2Obj.Size
				mapped = make([]byte, size)

// `api` label values.
func getHistogramMetrics(hist *prometheus.HistogramVec, desc MetricDescription, toLowerAPILabels bool) []MetricV2 {
	ch := make(chan prometheus.Metric)
	go func() {
		defer xioutil.SafeClose(ch)
		// Collects prometheus metrics from hist and sends it over ch
		hist.Collect(ch)
	}()

	// Converts metrics received into internal []Metric type

	// Add action message
	if uiErr.action != "" {
		renderedTxt += "> " + color.BgYellow(color.Black(uiErr.action)) + "\n"
	}
	// Add hint
	if uiErr.hint != "" {
		renderedTxt += color.Bold("HINT:") + "\n"
		renderedTxt += "  " + uiErr.hint
	}
	return renderedTxt

}

var src = rand.NewSource(time.Now().UnixNano())

func randString(n int) string {
	b := make([]byte, n)
	// A src.Int63() generates 63 random bits, enough for letterIdxMax characters!
	for i, cache, remain := n-1, src.Int63(), letterIdxMax; i >= 0; {
		if remain == 0 {
			cache, remain = src.Int63(), letterIdxMax
		}
		if idx := int(cache & letterIdxMask); idx < len(letterBytes) {
			b[i] = letterBytes[idx]
			i--

	lockSource := getSource(2)
	start := UTCNow()
	const readLock = false
	success := make([]int, len(li.paths))
	for i, path := range li.paths {
		if !li.ns.lock(ctx, li.volume, path, lockSource, li.opsID, readLock, timeout.Timeout()) {
			timeout.LogFailure()
			for si, sint := range success {
				if sint == 1 {
					li.ns.unlock(li.volume, li.paths[si], readLock)
				}
			}

				PutByteBuffer(payload)
				if err != nil {
					r := RemoteErr(err.Error())
					return &r
				}
			}

			var inT chan Req
			if h.InCapacity > 0 {
				// Don't add extra buffering
				inT = make(chan Req)
				go func() {
					defer xioutil.SafeClose(inT)
					for {
						select {
						case <-ctx.Done():
							return
						case v, ok := <-in:
							if !ok {
								return

		expectedFailure bool
	}{
		{"", "", true},
		{"-1", "0", true},
		{"-1", "900", true},
		{"1574812326", "900", false},
		{1574812326, "900", false},
		{int64(1574812326), "900", false},
		{int(1574812326), "900", false},
		{uint(1574812326), "900", false},
		{uint64(1574812326), "900", false},
		{json.Number("1574812326"), "900", false},
		{1574812326.000, "900", false},
		{time.Duration(3) * time.Minute, "900", false},
	}

	return evalDisks(disks, mErrs), err
}

func commonParity(parities []int, defaultParityCount int) int {
	N := len(parities)

	occMap := make(map[int]int)
	for _, p := range parities {
		occMap[p]++
	}

	var maxOcc, cparity int
	for parity, occ := range occMap {
		if parity == -1 {
			// Ignore non defined parity
			continue
		}