====== Добавляем отдельный диск для бэкапов ======
pvcreate /dev/sdb1 -ff
vgcreate Backup /dev/sdb1
lvcreate -l 100%FREE Backup -n backup
mkfs.ext4 /dev/mapper/Backup-backup
mkdir /var/lib/vzalx
root@proxmox:~# cat /etc/fstab
#
/dev/pve/root / ext4 errors=remount-ro 0 1
/dev/Backup/backup /var/lib/vzalx ext4 errors=remount-ro 0 1
/dev/pve/swap none swap sw 0 0
proc /proc proc defaults 0 0
root@proxmox:~# cat /etc/pve/storage.cfg
dir: local
path /var/lib/vz
content vztmpl
maxfiles 0
shared 0
lvmthin: local-lvm
thinpool data
vgname pve
content rootdir,images
dir: alx
path /var/lib/vzalx
content backup,iso
maxfiles 0
shared 0