Actually it is not a directory. I used df -h to see all available partitions. /var is one of them. I've got some new information! There are some NFS on /var partition! I think netxms cannot get correct available space due to NFS in /var....
I used instance discovery with FileSystem.MountPoints and I could see that there are some nfs inside of /var.
What should I do now?
Instance discovery list all partitions, but with error. The below picture shows just a portion of partitions. /var is part of them.
Filesystem Size Used Avail Use% Mounted on
172.16.131.2:/var/storage/files/inbox 45G 18G 25G 42% /var/storage/files/inbox
FileSystem.Free(/var/storage/files/inbox) shows 29G!
FileSystem.Avail(/var/storage/files/inbox) shows 26G!
[image: Screen Shot 2015-08-23 at 9.13.59 AM.png]
[image: Screen Shot 2015-08-23 at 9.34.06 AM.png]