var errInvalidRangeSource = errors.New("Range specified exceeds source object size")

// error returned by disks which are to be initialized are waiting for the
// first server to initialize them in distributed set to initialize them.
var errNotFirstDisk = errors.New("Not first drive")

// error returned by first disk waiting to initialize other servers.
var errFirstDiskWait = errors.New("Waiting on other drives")

// error returned for a negative actual size.

		configLogIf(ctx, fmt.Errorf("Unable to initialize remote webhook DNS config %w", err))
	}
	if err == nil && dnsURL != "" {
		bootstrapTraceMsg("initialize remote bucket DNS store")
		globalDNSConfig, err = dns.NewOperatorDNS(dnsURL,
			dns.Authentication(dnsUser, dnsPass),
			dns.RootCAs(globalRootCAs))
		if err != nil {
			configLogIf(ctx, fmt.Errorf("Unable to initialize remote webhook DNS config %w", err))
		}
	}

	return objLayer, formattedDisks, nil
}

// removeRoots - Cleans up initialized directories during tests.
func removeRoots(roots []string) {
	for _, root := range roots {
		os.RemoveAll(root)
	}
}

// creates a bucket for the tests and returns the bucket name.
// initializes the specified API endpoints for the tests.
// initializes the root and returns its path.
// return credentials.

func mustNewRequest(method string, urlStr string, contentLength int64, body io.ReadSeeker, t *testing.T) *http.Request {
	req, err := newTestRequest(method, urlStr, contentLength, body)
	if err != nil {
		t.Fatalf("Unable to initialize new http request %s", err)
	}
	return req
}

// This is similar to mustNewRequest but additionally the request
// is signed with AWS Signature V4, fails if not able to do so.

	ttl time.Duration

	opts Opts

	// Once can be used to initialize values for lazy initialization.
	// Should be set before calling Get().
	Once sync.Once

	// Managed values.
	valErr atomic.Pointer[struct {
		v T
		e error
	}]
	lastUpdateMs atomic.Int64
	updating     sync.Mutex
}

// New allocates a new cached value instance. Tt must be initialized with
// `.TnitOnce`.
func New[T any]() *Cache[T] {

	return types.TargetStats{
		TotalMessages:  atomic.LoadInt64(&h.totalMessages),
		FailedMessages: atomic.LoadInt64(&h.failedMessages),
		QueueLength:    queueLength,
	}
}

// Init initialize kafka target
func (h *Target) Init(ctx context.Context) error {
	if !h.kconfig.Enabled {
		return nil
	}
	if err := h.validate(); err != nil {
		return err
	}
	if h.kconfig.QueueDir != "" {

	cfg, _, err := globalBucketMetadataSys.GetQuotaConfig(ctx, bucketName)
	return cfg, err
}

// NewBucketQuotaSys returns initialized BucketQuotaSys
func NewBucketQuotaSys() *BucketQuotaSys {
	return &BucketQuotaSys{}
}

var bucketStorageCache = cachevalue.New[DataUsageInfo]()

// Init initialize bucket quota.
func (sys *BucketQuotaSys) Init(objAPI ObjectLayer) {
	bucketStorageCache.InitOnce(10*time.Second,

// loadFormatErasureAll - load all format config from all input disks in parallel.
func loadFormatErasureAll(storageDisks []StorageAPI, heal bool) ([]*formatErasureV3, []error) {
	// Initialize list of errors.
	g := errgroup.WithNErrs(len(storageDisks))

	// Initialize format configs.
	formats := make([]*formatErasureV3, len(storageDisks))

	// Load format from each disk in parallel
	for index := range storageDisks {
		index := index

	objectName := "config/x"

	// This exploit needs browser to be enabled.
	if !globalBrowserEnabled {
		globalBrowserEnabled = true
		defer func() { globalBrowserEnabled = false }()
	}

	// initialize HTTP NewRecorder, this records any mutations to response writer inside the handler.
	rec := httptest.NewRecorder()

			logger.Fatal(config.ErrUnableToWriteInBackend(err).Hint(hint), "Unable to initialize backend")
		}
	case errors.Is(err, errFaultyDisk):
		if !exit {
			storageLogOnceIf(GlobalContext, fmt.Errorf("Drive is faulty at %s, please replace the drive - drive will be offline", endpoint), "log-fatal-errs")
		} else {
			logger.Fatal(err, "Unable to initialize backend")
		}
	case errors.Is(err, errDiskFull):
		if !exit {