diff --git a/debian/chroot.install b/debian/chroot.install
index b00e4d8..a936bcf 100755
--- a/debian/chroot.install
+++ b/debian/chroot.install
@@ -17,6 +17,8 @@ vgname="ovhsys"
 manage_part=0
 ## If the script should use BTRFS
 manage_btrfs=1
+## If the script should create extra volume (eg. backup, virt, Proxmox,…)
+manage_extra_lv=0
 ## Colors definition {{{
 BLACK='\033[49;30m'
 BLACKB='\033[49;90m'
@@ -79,8 +81,10 @@ else
 	[ ! -b /dev/mapper/"${vgname}"-var  ] && lvcreate -n var  -L 10g  "${vgname}"
 fi
 ### Create extra LVs
-[ ! -b /dev/mapper/"${vgname}"-vz   ] && lvcreate -n vz   -L 150g "${vgname}"
-[ ! -b /dev/mapper/"${vgname}"-bkp  ] && lvcreate -n bkp  -L 150g "${vgname}"
+if [ "${manage_extra_lv}" -eq 0 ]; then
+	[ ! -b /dev/mapper/"${vgname}"-vz   ] && lvcreate -n vz   -L 150g "${vgname}"
+	[ ! -b /dev/mapper/"${vgname}"-bkp  ] && lvcreate -n bkp  -L 150g "${vgname}"
+fi
 [ ! -b /dev/mapper/"${vgname}"-swap ] && lvcreate -n swap -L 2g   "${vgname}"
 
 ### Format LVs in ext4
@@ -147,14 +151,16 @@ else  ### Or for ext4, create mountpoint and mount LV
 	printf '%b\n' "/dev/mapper/${vgname}-var  /var        ext4 defaults                   0 0" >> /tmp/target.fstab
 fi
 
-### Extra bkp LV
-mkdir -p -- /target/srv/backup
-mountpoint -q /target/srv/backup || mount -- /dev/mapper/"${vgname}"-bkp /target/srv/backup
-printf '%b\n' "/dev/mapper/${vgname}-bkp  /srv/backup ext4 defaults                   0 0" >> /tmp/target.fstab
-### Extra vz LV
-mkdir -p -- /target/var/lib/vz
-mountpoint -q /target/var/lib/vz || mount -- /dev/mapper/"${vgname}"-vz /target/var/lib/vz
-printf '%b\n' "/dev/mapper/${vgname}-vz   /var/lib/vz ext4 defaults                   0 0" >> /tmp/target.fstab
+if [ "${manage_extra_lv}" -eq 0 ]; then
+	### Extra bkp LV
+	mkdir -p -- /target/srv/backup
+	mountpoint -q /target/srv/backup || mount -- /dev/mapper/"${vgname}"-bkp /target/srv/backup
+	printf '%b\n' "/dev/mapper/${vgname}-bkp  /srv/backup ext4 defaults                   0 0" >> /tmp/target.fstab
+	### Extra vz LV
+	mkdir -p -- /target/var/lib/vz
+	mountpoint -q /target/var/lib/vz || mount -- /dev/mapper/"${vgname}"-vz /target/var/lib/vz
+	printf '%b\n' "/dev/mapper/${vgname}-vz   /var/lib/vz ext4 defaults                   0 0" >> /tmp/target.fstab
+fi
 
 ### Swap
 swapon -- /dev/mapper/"${vgname}"-swap