if hr.Before.Drives[0].State != madmin.DriveStateMissing {
		t.Fatalf("Unexpected drive state: %v", hr.Before.Drives[0].State)
	}

	// Check the state of all other disks (should be ok)
	for i, h := range append(hr.Before.Drives[1:], hr.After.Drives...) {
		if h.State != madmin.DriveStateOk {
			t.Fatalf("Unexpected drive state (%d): %v", i+1, h.State)
		}
	}

        assertEquals(10, ndrBuffer.getLength());

        ndrBuffer.setLength(20);
        assertEquals(20, ndrBuffer.getLength());

        // Test with derived buffer
        NdrBuffer derived = ndrBuffer.derive(0);
        derived.setLength(5);
        assertEquals(5, derived.getLength());
        assertEquals(5, ndrBuffer.getLength()); // Should affect original's deferred length
    }

    @Test
    void testAdvance() {

	storageDisks, format, err := waitForFormatErasure(true, endpoints, 1, 1, 16, "")
	if err != nil {
		t.Fatalf("Unable to format drives for erasure, %s", err)
	}

	ep := PoolEndpoints{Endpoints: endpoints}

	parity, err := ecDrivesNoConfig(16)
	if err != nil {
		t.Fatalf("Unexpected error during EC drive config: %v", err)
	}
	if _, err := newErasureSets(ctx, ep, storageDisks, format, parity, 0); err != nil {

			storageLogOnceIf(GlobalContext, fmt.Errorf("Drive is not writable %s, %s", endpoint, hint), "log-fatal-errs")
		} else {
			logger.Fatal(config.ErrUnableToWriteInBackend(err).Hint("%s", 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")

        : SetTestSuiteBuilder.using(keySetGenerator);
  }

  /**
   * To avoid infinite recursion, test suites with these marker features won't have derived suites
   * created for them.
   */
  enum NoRecurse implements Feature<@Nullable Void> {
    SUBMAP,
    DESCENDING;

    @Override
    public Set<Feature<? super @Nullable Void>> getImpliedFeatures() {

Joe Tsai <******@****.***> 1503528984 -0700

		if errors.Is(err, errNoHealRequired) {
			countNoHeal++
		}
		r.DiskCount += result.DiskCount
		r.SetCount += result.SetCount
		r.Before.Drives = append(r.Before.Drives, result.Before.Drives...)
		r.After.Drives = append(r.After.Drives, result.After.Drives...)
	}

	// No heal returned by all serverPools, return errNoHealRequired
	if countNoHeal == len(z.serverPools) {
		return r, errNoHealRequired
	}

    logger.get().log(FINER, "closing {0}", this);
    closeables.close();
  }

  private <U extends @Nullable Object> ClosingFuture<U> derive(FluentFuture<U> future) {
    ClosingFuture<U> derived = new ClosingFuture<>(future);
    becomeSubsumedInto(derived.closeables);
    return derived;
  }

  private void becomeSubsumedInto(CloseableList otherCloseables) {
    checkAndUpdateState(OPEN, SUBSUMED);

// 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.
var errInvalidDecompressedSize = errors.New("Invalid Decompressed Size")

        this.start = index = start;
        length = 0;
        deferred = this;
    }

    /**
     * Creates a derived NdrBuffer at the specified index position.
     *
     * @param idx the index position for the derived buffer
     * @return the derived NdrBuffer
     */
    public NdrBuffer derive(final int idx) {
        final NdrBuffer nb = new NdrBuffer(buf, start);
        nb.index = idx;
        nb.deferred = deferred;