[HN]# vzctl start 112
[HN]# vzctl set 112 --devnodes "sda1:rwq sda:rwq" --save # q - permits quota in VE
[root@dhcp0-53 ~]# cat /proc/vz/devperms
Version: 2.7
         0 b 016 *:*
         0 c 006 *:*
       112 b 016 8:1  # <<< quota is permited
       112 b 016 8:0 
[HN]# vzctl enter 112
[VE]# mount -t ext2 -o usrquota,grpquota /dev/sda1 /mnt/
[VE]# quotacheck /dev/sda1
[VE]# quotaon /dev/sda1
[VE]# quota -v
Disk quotas for user root (uid 0):
     Filesystem  blocks   quota   limit   grace   files   quota   limit   grace
      /dev/sda1   81220       0       0              84       0       0