const (
	driveUsedBytes               = "used_bytes"
	driveFreeBytes               = "free_bytes"
	driveTotalBytes              = "total_bytes"
	driveUsedInodes              = "used_inodes"
	driveFreeInodes              = "free_inodes"
	driveTotalInodes             = "total_inodes"
	driveTimeoutErrorsTotal      = "timeout_errors_total"
	driveIOErrorsTotal           = "io_errors_total"
	driveAvailabilityErrorsTotal = "availability_errors_total"

      "targets": [
        {
          "datasource": {
            "type": "prometheus",
            "uid": "${DS_PROMETHEUS}"
          },
          "exemplar": true,
          "expr": "minio_node_drive_free_inodes{job=~\"$scrape_jobs\",server=\"$server\"}",
          "interval": "",
          "legendFormat": "[{{drive}}]",
          "refId": "B"
        }
      ],
      "title": "Free Inodes",

| `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`     |

|:---------------------------------------|:--------------------------------------------------------------------|
| `minio_node_drive_free_bytes`          | Total storage available on a drive.                                 |
| `minio_node_drive_free_inodes`         | Total free inodes.                                                  |
| `minio_node_drive_latency_us`          | Average last minute latency in µs for drive API storage operations. |

	readTotal         MetricName = "read_total"
	timestampTotal    MetricName = "timestamp_total"
	writeTotal        MetricName = "write_total"
	total             MetricName = "total"
	freeInodes        MetricName = "free_inodes"

	lastMinFailedCount  MetricName = "last_minute_failed_count"
	lastMinFailedBytes  MetricName = "last_minute_failed_bytes"
	lastHourFailedCount MetricName = "last_hour_failed_count"

			di.Major = info.Major
			di.Minor = info.Minor
			di.RootDisk = info.RootDisk
			di.Healing = info.Healing
			di.Scanning = info.Scanning
			di.State = diskErrToDriveState(err)
			di.FreeInodes = info.FreeInodes
			di.UsedInodes = info.UsedInodes
			if info.Healing {
				if hi := disks[index].Healing(); hi != nil {
					hd := hi.toHealingDisk()
					di.HealInfo = &hd
				}
			}

			updateResourceMetrics(driveSubsystem, usedInodes, float64(di.UsedInodes), labels, false)
			updateResourceMetrics(driveSubsystem, totalInodes, float64(di.FreeInodes+di.UsedInodes), labels, false)
		}
	}
}

func collectLocalResourceMetrics() {
	var types madmin.MetricType = madmin.MetricsDisk | madmin.MetricNet | madmin.MetricsMem | madmin.MetricsCPU

		err = msgp.WrapError(err, "Used")
		return
	}
	z.UsedInodes, err = dc.ReadUint64()
	if err != nil {
		err = msgp.WrapError(err, "UsedInodes")
		return
	}
	z.FreeInodes, err = dc.ReadUint64()
	if err != nil {
		err = msgp.WrapError(err, "FreeInodes")
		return
	}
	z.Major, err = dc.ReadUint32()
	if err != nil {
		err = msgp.WrapError(err, "Major")
		return
	}
	z.Minor, err = dc.ReadUint32()

//
// The above means that any added/deleted fields are incompatible.
//
//msgp:tuple DiskInfo
type DiskInfo struct {
	Total      uint64
	Free       uint64
	Used       uint64
	UsedInodes uint64
	FreeInodes uint64
	Major      uint32
	Minor      uint32
	NRRequests uint64
	FSType     string
	RootDisk   bool
	Healing    bool
	Scanning   bool
	Endpoint   string
	MountPath  string
	ID         string

	perDisk := size / int64(nDisks)
	for _, disk := range di {
		if disk == nil || disk.Total == 0 {
			continue
		}
		if !globalIsErasureSD && disk.FreeInodes < diskMinInodes && disk.UsedInodes > 0 {
			// We have an inode count, but not enough inodes.
			return false, nil
		}
		if int64(disk.Free) <= perDisk {
			return false, nil
		}
	}