Not sure if this is a bug, or a feature, or simply a configuration issue. I've seen it on Ubuntu 6.06LTS, Debian 3.1 and Debian 3.3.
Webmin (and thus Virtualmin) quotas do not deal with quotas on my systems hosted on Virtuozzo correctly. This can be fixed by going to the Disk and Network Filesystems module configuration and switching the 'File listing filesystems mounted at boot time' from /etc/fstab to /etc/mtab. On checking the contents of the files, fstab doesn't actually include the usrquota & grpquota options. However, since this is on a Virtuozzo hosted machine, fstab is actually a link to /proc/mounts (I was instructed to set this to enable quotas), and I can't / don't need to deal with creating or editing mounts, so is there any problem with using mtab?
I guess the feature request would be to detect that using mtab rather than fstab is the way to configure during installation, or maybe just a line of help if the quota system doesn't detect quotas available on a filesystem - 'try using /etc/mtab instead' or something along those lines.
details of the system:
root@vps02:/etc# ll mtab fstab
lrwxrwxrwx 1 root root 12 Nov 20 08:02 fstab -> /proc/mounts
-rw-r--r-- 1 root root 252 Nov 18 14:07 mtab
root@vps02:/etc# cat mtab
/dev/vzfs / reiserfs rw,usrquota,grpquota 0 0
proc /proc proc rw,nodiratime 0 0
tmpfs /var/run tmpfs rw 0 0
tmpfs /var/lock tmpfs rw 0 0
devpts /dev/pts devpts rw 0 0
tmpfs /dev/shm tmpfs rw 0 0
tmpfs /var/run tmpfs rw 0 0
tmpfs /var/lock tmpfs rw 0 0
root@vps02:/etc# cat fstab
vzfs / vzfs rw 0 0
proc /proc proc rw,nodiratime 0 0
tmpfs /var/run tmpfs rw 0 0
tmpfs /var/lock tmpfs rw 0 0
devpts /dev/pts devpts rw 0 0
tmpfs /dev/shm tmpfs rw 0 0
tmpfs /var/run tmpfs rw 0 0
tmpfs /var/lock tmpfs rw 0 0
root@vps02:/etc# diff mtab fstab
1c1
< /dev/vzfs / reiserfs rw,usrquota,grpquota 0 0
---
> vzfs / vzfs rw 0 0
root@vps02:/etc#