| `minio_system_drive_used_inodes`               | `gauge`   | Total used inodes on a drive                                       | `drive,set_index,drive_index,pool_index,server`     |
| `minio_system_drive_free_inodes`               | `gauge`   | Total free inodes on a drive                                       | `drive,set_index,drive_index,pool_index,server`     |

	if ssParity > 0 && rrsParity > 0 {
		if ssParity < rrsParity {
			return fmt.Errorf("Standard storage class parity drives %d should be greater than or equal to Reduced redundancy storage class parity drives %d", ssParity, rrsParity)
		}
	}
	return nil
}

// GetParityForSC - Returns the data and parity drive count based on storage class
// If storage class is set using the env vars MINIO_STORAGE_CLASS_RRS and

func getStorageViaEndpoint(endpoint Endpoint) StorageAPI {
	globalLocalDrivesMu.RLock()
	defer globalLocalDrivesMu.RUnlock()
	if len(globalLocalSetDrives) == 0 {
		for _, drive := range globalLocalDrives {
			if drive != nil && drive.Endpoint().Equal(endpoint) {
				return drive
			}
		}
	}
	return globalLocalSetDrives[endpoint.PoolIdx][endpoint.SetIdx][endpoint.DiskIdx]
}

func (s *storageRESTServer) getStorage() StorageAPI {

| `minio_node_drive_total_inodes`      | Total inodes on a drive.                                 |
| `minio_node_drive_used_inodes`       | Total inodes used on a drive.                            |
| `minio_node_drive_reads_per_sec`     | Reads per second on a drive.                             |
| `minio_node_drive_reads_kb_per_sec`  | Kilobytes read per second on a drive.                    |

	// prefers setCounts to be sorted for optimal behavior.
	if divisibleSize < setCounts[len(setCounts)-1] {
		return divisibleSize
	}

	// Figure out largest value of total_drives_in_erasure_set which results
	// in least number of total_drives/total_drives_erasure_set ratio.
	prevD := divisibleSize / setCounts[0]
	for _, cnt := range setCounts {
		if divisibleSize%cnt == 0 {
			d := divisibleSize / cnt
			if d <= prevD {

	if len(filteredDisks) != len(erasureDisks) {
		t.Errorf("Unexpected number of drives: %d", len(filteredDisks))
	}
	for diskIndex, disk := range filteredDisks {
		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)
		}
	}

	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 {

    set-drive-count: 4 # Advanced option, must be used under guidance from MinIO team.
```

### Things to know

- Fields such as `version` and `pools` are mandatory, however all other fields are optional.
- Each pool expects a minimum of 2 nodes per pool, and unique non-repeating hosts for each argument.
- Each pool expects each host in this pool has the same number of drives specified as any other host.

          "expr": "minio_node_drive_used_bytes{job=~\"$scrape_jobs\",server=\"$server\"}",
          "interval": "",
          "legendFormat": "Used [{{drive}}]",
          "refId": "B"
        },
        {
          "datasource": {
            "type": "prometheus",
            "uid": "${DS_PROMETHEUS}"
          },
          "exemplar": true,

			storageLogOnceIf(context.Background(),
				fmt.Errorf("unexpected drive ordering on pool: %s: found drive at (set=%s, drive=%s), expected at (set=%s, drive=%s): %s(%s): %w",
					humanize.Ordinal(ep.PoolIdx+1), humanize.Ordinal(m+1), humanize.Ordinal(n+1), humanize.Ordinal(ep.SetIdx+1), humanize.Ordinal(ep.DiskIdx+1),
					s, s.diskID, errInconsistentDisk), "drive-order-format-json")
			return s, errInconsistentDisk
		}
		s.diskID = diskID