if resCh != nil {
					resErr = nil
					select {
					case resCh <- results:
					case <-ctx.Done():
					}
					resCh = nil
					returned = true
				}
				continue
			}
			results.o = append(results.o, entry)
		}
		if resCh != nil {
			resErr = io.EOF
			select {
			case <-ctx.Done():
				// Nobody wants it.
			case resCh <- results:
			}
		}
	}()

func diskErrToDriveState(err error) (state string) {
	switch {
	case errors.Is(err, errDiskNotFound) || errors.Is(err, context.DeadlineExceeded):
		state = madmin.DriveStateOffline
	case errors.Is(err, errCorruptedFormat) || errors.Is(err, errCorruptedBackend):
		state = madmin.DriveStateCorrupt
	case errors.Is(err, errUnformattedDisk):
		state = madmin.DriveStateUnformatted
	case errors.Is(err, errDiskAccessDenied):

	}

	switch minioErr.Code {
	case "SlowDownWrite":
		err = InsufficientWriteQuorum{Bucket: bucket, Object: object}
	case "SlowDownRead":
		err = InsufficientReadQuorum{Bucket: bucket, Object: object}
	case "PreconditionFailed":
		err = PreConditionFailed{}
	case "InvalidRange":
		err = InvalidRange{}
	case "BucketAlreadyOwnedByYou":
		err = BucketAlreadyOwnedByYou{}
	case "BucketNotEmpty":
		err = BucketNotEmpty{}

				switch test.fault {
				case MissingContentLength:
					req.ContentLength = -1
					// Setting the content length to a value greater than the max allowed size of a part.
					// Used in test case  4.
				case TooBigObject:
					req.ContentLength = globalMaxObjectSize + 1
					// Malformed signature.
					// Used in test case  6.
				case BadSignature:

	}

	// Fetch buffer for I/O, returns from the pool if not allocates a new one and returns.
	var buffer []byte
	switch size := data.Size(); {
	case size == 0:
		buffer = make([]byte, 1) // Allocate at least a byte to reach EOF
	case size == -1:
		if size := data.ActualSize(); size > 0 && size < fi.Erasure.BlockSize {
			// Account for padding and forced compression overhead and encryption.

			evt := evalActionFromLifecycle(ctx, *lc, lr, rcfg, objInfo)
			switch {
			case evt.Action.DeleteRestored(): // if restored copy has expired,delete it synchronously
				applyExpiryOnTransitionedObject(ctx, newObjectLayerFn(), objInfo, evt, lcEventSrc_Heal)
				return false
			case evt.Action.Delete():
				globalExpiryState.enqueueByDays(objInfo, evt, lcEventSrc_Heal)
				return true
			default:

	for i, v := range availableDisks {
		driveState := ""
		switch {
		case v != nil:
			driveState = madmin.DriveStateOk
		case errs[i] == errDiskNotFound, dataErrs[i] == errDiskNotFound:
			driveState = madmin.DriveStateOffline
		case errs[i] == errFileNotFound, errs[i] == errFileVersionNotFound, errs[i] == errVolumeNotFound:
			fallthrough

	}

	vars := mux.Vars(r)
	group := vars["group"]
	status := vars["status"]

	var (
		err       error
		updatedAt time.Time
	)
	switch status {
	case statusEnabled:
		updatedAt, err = globalIAMSys.SetGroupStatus(ctx, group, true)
	case statusDisabled:
		updatedAt, err = globalIAMSys.SetGroupStatus(ctx, group, false)
	default:
		err = errInvalidArgument
	}
	if err != nil {

		v := strings.ToLower(vs)
		switch v {
		case "true", "false":
			objectLockEnabled = v == "true"
		default:
			writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrInvalidRequest), r.URL)
			return
		}
	}

	forceCreate := false
	if vs := r.Header.Get(xhttp.MinIOForceCreate); len(vs) > 0 {
		v := strings.ToLower(vs)
		switch v {
		case "true", "false":
			forceCreate = v == "true"
		default:

		partNumString := strconv.Itoa(testCase.partNum)
		fi.AddObjectPart(testCase.partNum, "etag."+partNumString, int64(testCase.partNum+humanize.MiByte), ActualSize, UTCNow(), nil, nil)
	}

	// Add failure test case.
	testCases = append(testCases, struct {
		partNum       int
		expectedIndex int
	}{6, -1})

	// Test them.
	for _, testCase := range testCases {