این لینک رو پیش رفته تا یه حدی موقع ایجاد اون فایل ارور میزنه
[root@ms600 /]# pvcreate /dev/sda1
Can't open /dev/sda1 exclusively. Mounted filesystem?
[root@ms600 /]# vgcreate new_vol_group /dev/sda1
Can't open /dev/sda1 exclusively. Mounted filesystem?
Unable to add physical volume '/dev/sda1' to volume group 'new_vol_group'.