zabbix detect wrong free space on linux partition

[mixmox]

hello
my zabbix item detect wrong free space on linux

df -h:
/dev/sdb1 800G 72G 728G 9% /backup

my zabbix item and trigger:
{My Linux:vfs.fs.size[/backup,pfree].last()}>85

zabbix last value is:
88.2072 %

[Markku]

Hi, I checked one of my hosts and there the values matched (47% used and 53% pfree). What is your Zabbix agent version? How old was the item value compared to your df command execution?

Your trigger doesn't make sense to me (alert when free space is over 85%) but that's up to your requirements.

Markku

[mansourh12120]

hello every body!
i created a file in externalscript and wrote below script in it

#!/bin/bash
packetloss= 'ping -q -i0.30 -n -s 50 -c5 ${1} | grep "packet loss" | cut -d " " -f6 | cut -d "%" -f1
[ -z "$ {packetloss}" ] && packetloss=100
echo "${packetloss}"

now i create an item with key packetloss(script file name) but i get this error" value of type "string" is not suitable for value type(float)".value "connect:invalid argument
thanks