| `minio_system_drive_reads_await`               | Average time for read requests served on a drive. <br><br>Type: gauge                   | `drive`, `set_index`, `drive_index`, `pool_index`, `server`        |

    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.

	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)
	}

		msg := fmt.Sprintf("Incorrect number of endpoints provided %s, number of drives %d is not divisible by any supported erasure set sizes %d", args, commonSize, setSizes)
		return nil, config.ErrInvalidNumberOfErasureEndpoints(nil).Msg(msg)
	}

	var setSize uint64
	// Custom set drive count allows to override automatic distribution.
	// only meant if you want to further optimize drive distribution.
	if setDriveCount > 0 {

If you have traditional spinning (hdd) drives, some applications with high concurrency might require MinIO cluster to be tuned such that to avoid random I/O on the drives. The way to convert high concurrent I/O into a sequential I/O is by reducing the number of concurrent operations allowed per cluster. This allows MinIO cluster to be operationally resilient to such workloads, while also making sure the drives are at optimal efficiency and responsive.

	ch := make(chan madmin.SpeedTestResult, 1)
	go func() {
		defer xioutil.SafeClose(ch)

		concurrency := opts.concurrencyStart

		if opts.autotune {
			// if we have less drives than concurrency then choose
			// only the concurrency to be number of drives to start
			// with - since default '32' might be big and may not
			// complete in total time of 10s.
			if globalEndpoints.NEndpoints() < concurrency {

	}

	// Fetch all the drive info status.
	beforeDrives := formatsToDrivesInfo(s.endpoints.Endpoints, formats, sErrs)

	res.After.Drives = make([]madmin.HealDriveInfo, len(beforeDrives))
	res.Before.Drives = make([]madmin.HealDriveInfo, len(beforeDrives))
	// Copy "after" drive state too from before.
	for k, v := range beforeDrives {
		res.Before.Drives[k] = v
		res.After.Drives[k] = v
	}

	cat <<EOF >/tmp/minio.configfile.$i
version: v1
address: ':${s3Port}'
console-address: ':${consolePort}'
rootUser: 'minr0otUS2r'
rootPassword: 'pBU94AGAY85e'
pools: # Specify the nodes and drives with pools
  -
     - 'http://localhost:9001/tmp/xl/node9001/mnt/disk{1...4}/'
     - 'http://localhost:9002/tmp/xl/node9002/mnt/disk{1,2,3,4}/'
  -
     - 'http://localhost:9003/tmp/xl/node9003/mnt/disk{1...4}/'

		SetCount: -1, // explicitly set an invalid value -1, for bucket heal scenario
	}

	for i, err := range errs {
		if err == nil {
			res.Before.Drives = append(res.Before.Drives, healBucketResults[i].Before.Drives...)
			res.After.Drives = append(res.After.Drives, healBucketResults[i].After.Drives...)
		}
	}

	return res, nil
}

// ListBuckets lists buckets across all nodes and returns a consistent view:

          "legendFormat": "Free [{{drive}}]",
          "refId": "C"
        }
      ],
      "title": "Drive Usage",
      "type": "timeseries"
    },
    {
      "datasource": {
        "type": "prometheus",
        "uid": "${DS_PROMETHEUS}"
      },
      "description": "",
      "fieldConfig": {
        "defaults": {
          "color": {
            "mode": "palette-classic"
          },