Hello, I have incorrect result from Zabbix Agent about free space with large disks.
Look at the example below – /data1 and /data2 is Ok, but /backup and /backup2 is Wrong.

Where is the problem, and is there a workaround solution ?

Example:

[zabbix@linux1 bin]$ df
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/cciss/c0d0p1 139050576 108923548 23063652 83% /
none 1037476 0 1037476 0% /dev/shm
/dev/cciss/c0d1p1 69210320 51292348 14402240 79% /data1
/dev/cciss/c0d1p2 69210336 41428232 24266368 64% /data2
/dev/cciss/c0d1p3 2694624 36868 2520872 2% /tmp
nas-gw-man:NASora 701830112 306601920 395228192 44% /backup
nas-gw-man:NASora2 721265824 672881568 48384256 94% /backup2
[zabbix@linux1 bin]$
[zabbix@linux1 bin]$ ./zabbix_agentd -c /etc/zabbix/zabbix_agentd.conf -t vfs.fs.size[/data1,free]
vfs.fs.size[/data1,free] [u|14402240]
[zabbix@linux1 bin]$ ./zabbix_agentd -c /etc/zabbix/zabbix_agentd.conf -t vfs.fs.size[/data2,free]
vfs.fs.size[/data2,free] [u|24266368]
[zabbix@linux1 bin]$ ./zabbix_agentd -c /etc/zabbix/zabbix_agentd.conf -t vfs.fs.size[/backup,free]
vfs.fs.size[/backup,free] [u|49403524]
[zabbix@linux1 bin]$ ./zabbix_agentd -c /etc/zabbix/zabbix_agentd.conf -t vfs.fs.size[/backup2,free]
vfs.fs.size[/backup2,free] [u|6048032]
[zabbix@linux1 bin]$
[zabbix@linux1 bin]$ ./zabbix_agentd -c /etc/zabbix/zabbix_agentd.conf -t agent.version
agent.version [s|1.4.5]
[zabbix@linux1 bin]$ uname -r 2.6.9-34.ELsmp
[zabbix@linux1 bin]$
[zabbix@linux1 bin]$ cat /etc/issue
Red Hat Enterprise Linux ES release 4 (Nahant Update 4)
Kernel \r on an \m
[zabbix@bo1-new bin]$