Problem is that I can't resolve free disk space on some disk devices, which are mounted deeper in FS. It is not about size of device (as in ZBX-3159). I tried to resolve bigger partition on other system, and found no problem.

Zabbix agent v.1.8.3, zabbix server v. 1.8.1. Interesting is, that in case I'm trying to resolve it on the server (koza), I get the result without problems. If I try it from zabbix server (zabak), then I found, that it is not supported. When I try it from windows computer with zabbix agent v.1.8.2, problem is the same. When I try it from another linux with zabbix agent v 1.8.3, problem is the same.

• • • Mounted FSs
      koza:~# df -h
      Filesystem Size Used Avail Use% Mounted on
      ...
      /dev/sdc1 917G 804G 68G 93% /home/bacula/storage/vol1
      ...

• • • from local machine
      koza:~# zabbix_agent -t vfs.fs.size[/home/bacula/storage/vol1]
      vfs.fs.size[] [u|984506441728]

– from server
zabak:~# zabbix_get -s koza -k vfs.fs.size[/]
15746809856

zabak:~# zabbix_get -s koza -k vfs.fs.size[/home]
393725661184

zabak:~# zabbix_get -s koza -k vfs.fs.size[/home/bacula]
393725661184

zabak:~# zabbix_get -s koza -k vfs.fs.size[/home/bacula/storage]
ZBX_NOTSUPPORTED

zabak:~# zabbix_get -s koza -k vfs.fs.size[/home/bacula/storage/vol1]
ZBX_NOTSUPPORTED

• • • from other machine (windows)
      C:\Program Files (x86)\Zabbix Agent>zabbix_get.exe -s koza -k vfs.fs
      .size[/home/bacula/storage/vol1]
      ZBX_NOTSUPPORTED

• • • from anothe linux
      gw:# zabbix_get -s koza -k vfs.fs.size[/home/bacula/storage/vol1]
      ZBX_NOTSUPPORTED