if disk == nil || !disk.IsOnline() {
				parityDrives++
				offlineDrives++
				continue
			}
		}

		if offlineDrives >= (len(storageDisks)+1)/2 {
			// if offline drives are more than 50% of the drives
			// we have no quorum, we shouldn't proceed just
			// fail at that point.
			return ObjectInfo{}, toObjectErr(errErasureWriteQuorum, bucket, object)
		}

func TestErasureHeal(t *testing.T) {
	for i, test := range erasureHealTests {
		if test.offDisks < test.badStaleDisks {
			// test case sanity check
			t.Fatalf("Test %d: Bad test case - number of stale drives cannot be less than number of badstale drives", i)
		}

		// create some test data
		setup, err := newErasureTestSetup(t, test.dataBlocks, test.disks-test.dataBlocks, test.blocksize)
		if err != nil {

	return "Storage reached its minimum free drive threshold."
}

// SlowDown  too many file descriptors open or backend busy .
type SlowDown struct{}

func (e SlowDown) Error() string {
	return "Please reduce your request rate"
}

// RQErrType reason for read quorum error.
type RQErrType int

const (
	// RQInsufficientOnlineDrives - not enough online drives.
	RQInsufficientOnlineDrives RQErrType = 1 << iota

	// https://github.com/minio/minio/issues/8035
	// XFS can show wrong values at times error out
	// in such scenarios.
	if info.Free > info.Total {
		return info, fmt.Errorf("detected free space (%d) > total drive space (%d), fs corruption at (%s). please run 'fsck'", info.Free, info.Total, path)
	}
	info.Used = info.Total - info.Free

	if firstTime {
		bfs, err := blockdevice.NewDefaultFS()
		if err == nil {
			devName := ""

## If left empty, it defaults to the value of {{ .Values.mountPath }}
## If defined, it must be a sub-directory of the path specified in {{ .Values.mountPath }}
##
bucketRoot: ""

# Number of drives attached to a node
drivesPerNode: 1
# Number of MinIO containers running
replicas: 16
# Number of expanded MinIO clusters
pools: 1

## TLS Settings for MinIO
tls:
  enabled: false

          "editorMode": "builder",
          "expr": "minio_cluster_health_erasure_set_online_drives{job=~\"$scrape_jobs\"}",
          "fullMetaSearch": false,
          "hide": false,
          "includeNullMetadata": true,
          "instant": false,
          "legendFormat": "Pool {{pool}} / Set {{set}} - Online Drives",
          "range": true,
          "refId": "A",
          "useBackend": false
        },

			logger.Event(context.Background(), "healthcheck",
				"node(%s): Read/Write/Delete successful, bringing drive %s online", globalLocalNodeName, p.storage.String())
			p.health.status.Store(diskHealthOK)
			p.health.waiting.Add(-1)
			return
		}
	}
}

// monitorDiskStatus should be called once when a drive has been marked offline.
// Once the disk has been deemed ok, it will return to online status.

	errs := g.Wait()
	for index, err := range errs {
		if err == nil {
			continue
		}
		if !IsErr(err, ignoredErrs...) {
			storageLogOnceIf(ctx, fmt.Errorf("Drive %s, path (%s/%s) returned an error (%w)",
				disks[index], req.Bucket, req.Prefix, err),
				disks[index].String())
		}
	}

	// Return all the metadata.
	return dataArray, nil

Unit tests

```
λ make test
```

Verify different type of MinIO deployments work

```
λ make verify
```

Verify if healing and replacing a drive works

```
λ make verify-healing
```

	if err != nil {
		t.Fatal(err)
	}

	// Object was uploaded with 4 known bad drives, so we should still be able to lose 3 drives and still write to the object.
	erasureDisks = xl.getDisks()
	z.serverPools[0].erasureDisksMu.Lock()
	xl.getDisks = func() []StorageAPI {
		erasureDisks[7] = nil
		erasureDisks[8] = nil