VolInfo: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On CentOS possible default full paths are:

/usr/bin/VolInfo - from package: edk2-tools

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/sbin/volinfo - from package: openafs-fileserver

You may install the required package with command apt-get install {package}

Error in other languages:
VolInfo: bevel nie gevind nie
VolInfo: comandă negăsită
VolInfo: comando não encontrado
VolInfo: commande introuvable
VolInfo: command not found
VolInfo: käsku ei ole
VolInfo: không tìm thấy lệnh
VolInfo: komanda nerasta
VolInfo: Kommando nicht gefunden.
VolInfo: kommandot finns inte
VolInfo: komut yok
VolInfo: nie znaleziono polecenia
VolInfo: níor aimsíodh an t-ordú
VolInfo: no se encontró la orden
VolInfo: no s'ha trobat l'ordre
VolInfo: opdracht niet gevonden
VolInfo: parancs nem található
VolInfo: perintah tidak ditemukan
VolInfo: príkaz nenájdený
VolInfo: příkaz nenalezen
VolInfo: команда не найдена
VolInfo: командата не е открита
VolInfo: 命令找不到
VolInfo: コマンドが見つかりません