return nil, err
	}
	return d.disk.ListVols(ctx)
}

func (d *naughtyDisk) StatVol(ctx context.Context, volume string) (vol VolInfo, err error) {
	if err := d.calcError(); err != nil {
		return VolInfo{}, err
	}
	return d.disk.StatVol(ctx, volume)
}

func (d *naughtyDisk) DeleteVol(ctx context.Context, volume string, forceDelete bool) (err error) {
	if err := d.calcError(); err != nil {
		return err

	}
}

// Close all the writers.
func closeBitrotWriters(ws []io.Writer) []error {
	errs := make([]error, len(ws))
	for i, w := range ws {
		if w == nil {
			errs[i] = errDiskNotFound
			continue
		}
		if bw, ok := w.(io.Closer); ok {
			errs[i] = bw.Close()
		} else {
			errs[i] = nil
		}
	}
	return errs
}

// Returns hash sum for whole-bitrot, nil for streaming-bitrot.

	b, err := json.Marshal(m)
	if err != nil {
		t.Fatal(err)
	}

	if err = os.MkdirAll(pathJoin(rootPath, minioMetaBucket), os.FileMode(0o755)); err != nil {
		t.Fatal(err)
	}

	if err = os.WriteFile(pathJoin(rootPath, minioMetaBucket, formatConfigFile), b, os.FileMode(0o644)); err != nil {
		t.Fatal(err)
	}

	formatData, _, err := formatErasureMigrate(rootPath)

	lfi, err := meta.ToFileInfo(bucket, object, "", inclFreeVers, true)
	if err != nil {
		for i := range errs {
			if errs[i] == nil {
				errs[i] = err
			}
		}
		return metaFileInfos, errs
	}
	if !lfi.IsValid() {
		for i := range errs {
			if errs[i] == nil {
				errs[i] = errFileCorrupt
			}
		}
		return metaFileInfos, errs
	}

	versionID := lfi.VersionID

				perPoolErrs = append(perPoolErrs, errs[i])
			}
		}
		quorum := len(perPoolErrs) / 2
		if poolErr := reduceWriteQuorumErrs(ctx, perPoolErrs, bucketOpIgnoredErrs, quorum); poolErr != nil {
			return madmin.HealResultItem{}, poolErr
		}
	}

	if healBucketErr := reduceWriteQuorumErrs(ctx, errs, bucketOpIgnoredErrs, len(errs)/2+1); healBucketErr != nil {

// the corresponding error in errs slice is not nil
func evalDisks(disks []StorageAPI, errs []error) []StorageAPI {
	if len(errs) != len(disks) {
		bugLogIf(GlobalContext, errors.New("unexpected drives/errors slice length"))
		return nil
	}
	newDisks := make([]StorageAPI, len(disks))
	for index := range errs {
		if errs[index] == nil {
			newDisks[index] = disks[index]
		} else {

func (r *metacacheReader) filter(o listPathOptions) (entries metaCacheEntriesSorted, err error) {
	// Forward to prefix, if any
	err = r.forwardTo(o.Prefix)
	if err != nil {
		return entries, err
	}
	if o.Marker != "" {
		err = r.forwardTo(o.Marker)
		if err != nil {
			return entries, err
		}
	}
	o.debugln("forwarded to ", o.Prefix, "marker:", o.Marker, "sep:", o.Separator)

	// Filter

				uClient := s.getUserClient(c, accessKeys[i], secretKeys[i], "")
				err := s.adm.RemoveUser(ctx, accessKeys[i])
				if err != nil {
					return err
				}
				c.mustNotListObjects(ctx, uClient, bucket)
				return nil
			}
		}(i), i)
	}
	if errs := g.Wait(); len(errs) > 0 {
		c.Fatalf("unable to remove users: %v", errs)
	}

// countErrs - count a specific error.
func countErrs(errs []error, err error) int {
	i := 0
	for _, err1 := range errs {
		if err1 == err || errors.Is(err1, err) {
			i++
		}
	}
	return i
}

// Does all errors indicate we need to initialize all disks?.
func shouldInitErasureDisks(errs []error) bool {
	return countErrs(errs, errUnformattedDisk) == len(errs)
}

		}
		return ps
	}

	mkTest := func(N, parity, agree int) (res struct {
		metaArr  []FileInfo
		errs     []error
		parities []int
		parity   int
	},
	) {
		res.metaArr = mkMetaArr(N, parity, agree)
		res.parities = mkParities(N, N-(N/2+1), parity, agree)
		res.errs = make([]error, N)
		if agree >= N/2+1 { // simple majority consensus
			res.parity = N - (N/2 + 1)
		} else {