}

		// Step 3: Upload the object with some disks offline
		sets.erasureDisksMu.Lock()
		xl.getDisks = func() []StorageAPI {
			disks := make([]StorageAPI, len(origErasureDisks))
			copy(disks, origErasureDisks)
			disks[0] = nil
			disks[1] = nil
			return disks
		}
		sets.erasureDisksMu.Unlock()

	}
	disks := setup.disks
	erasure, err := NewErasure(context.Background(), data, parity, blockSizeV2)
	if err != nil {
		b.Fatalf("failed to create ErasureStorage: %v", err)
	}

	writers := make([]io.Writer, len(disks))
	for i, disk := range disks {
		if disk == nil {
			continue
		}

	ctx, cancel := context.WithCancel(t.Context())
	defer cancel()
	// Tests for ErasureSD object layer.
	nDisks := 1
	disks, err := getRandomDisks(nDisks)
	if err != nil {
		t.Fatal("Failed to create drives for the backend")
	}
	defer removeRoots(disks)

	obj, err := newObjectLayer(ctx, mustGetPoolEndpoints(0, disks...))
	if err != nil {
		t.Fatal("Unexpected object layer initialization error", err)
	}

	}
	disks := setup.disks
	buffer := make([]byte, blockSizeV2, 2*blockSizeV2)
	content := make([]byte, size)

	for i := range dataDown {
		disks[i] = OfflineDisk
	}
	for i := data; i < data+parityDown; i++ {
		disks[i] = OfflineDisk
	}

	b.SetBytes(size)
	b.ReportAllocs()
	for b.Loop() {
		writers := make([]io.Writer, len(disks))
		for i, disk := range disks {

// relinquishes the underlying connection for all storage disks.
func closeStorageDisks(storageDisks ...StorageAPI) {
	var wg sync.WaitGroup
	for _, disk := range storageDisks {
		if disk == nil {
			continue
		}
		wg.Add(1)
		go func(disk StorageAPI) {
			defer wg.Done()
			disk.Close()
		}(disk)
	}
	wg.Wait()
}

// Initialize storage disks for each endpoint.

}

func writeAllMetadataWithRevert(ctx context.Context, disks []StorageAPI, origbucket, bucket, prefix string, files []FileInfo, quorum int, revert bool) ([]StorageAPI, error) {
	g := errgroup.WithNErrs(len(disks))

	// Start writing `xl.meta` to all disks in parallel.
	for index := range disks {
		g.Go(func() error {
			if disks[index] == nil {
				return errDiskNotFound
			}

	diskPaths    []string
	disks        []StorageAPI
}

// Returns an initialized setup for erasure tests.
func newErasureTestSetup(tb testing.TB, dataBlocks int, parityBlocks int, blockSize int64) (*erasureTestSetup, error) {
	diskPaths := make([]string, dataBlocks+parityBlocks)
	disks := make([]StorageAPI, len(diskPaths))
	var err error
	for i := range diskPaths {
		disks[i], diskPaths[i], err = newXLStorageTestSetup(tb)

	_, _ = checkObjectWithAllParts(ctx, erasureDisks, partsMetadata,
		errs, fi, false, bucket, object, madmin.HealDeepScan)

	for diskIndex, disk := range erasureDisks {
		if diskIndex == 0 && disk != nil {
			t.Errorf("Drive not filtered as expected, drive: %d", diskIndex)
		}
		if diskIndex != 0 && disk == nil {
			t.Errorf("Drive erroneously filtered, driveIndex: %d", diskIndex)
		}
	}

	globalLocalDrivesMu.RUnlock()

	// Initialize sync waitgroup.
	g := errgroup.WithNErrs(len(localDrives))

	// Disk states slices
	beforeState := make([]string, len(localDrives))
	afterState := make([]string, len(localDrives))

	// Make a volume entry on all underlying storage disks.
	for index := range localDrives {
		g.Go(func() (serr error) {
			if localDrives[index] == nil {

func GetTotalUsableCapacityFree(diskInfo []madmin.Disk, s StorageInfo) (capacity uint64) {
	for _, disk := range diskInfo {
		// Ignore invalid.
		if disk.PoolIndex < 0 || len(s.Backend.StandardSCData) <= disk.PoolIndex {
			// https://github.com/minio/minio/issues/16500
			continue
		}
		// Ignore parity disks
		if disk.DiskIndex < s.Backend.StandardSCData[disk.PoolIndex] {
			capacity += disk.AvailableSpace
		}
	}
	return capacity