to reproduce https://github.com/shirou/gopsutil/issues/618

issue_618.go

package main

import (
	"fmt"

	"github.com/shirou/gopsutil/disk"
)

func main() {
	parts, err := disk.Partitions(true)
	if err != nil {
		panic(err)
	}

	for _, part := range parts {
		u, errUsage := disk.Usage(part.Mountpoint)
		if errUsage != nil {
			fmt.Println(errUsage)
			continue
		}

		counters, errIO := disk.IOCounters(part.Mountpoint)
		if errIO != nil {
			fmt.Println(errIO)
		}

		fmt.Println(u, counters)
	}
}