Zabbix - NetApp SNMP disk strange values

[kofeyh]

I have a question.

I'm trying to monitor a netapp storage appliance, and I am querying via SNMP; for example aggr0 disk free.

The metric is reported from the device in kbytes, somewhere, Zabbix is not handling multiple terabyte translation properly.

Here's the SNMP query:

snmpget -v2c -c public <hostname> dfKBytesAvail.1
NETAPP-MIB::dfKBytesAvail.1 = INTEGER: 2089057736

Awesome, ~2TB available.

However, Zabbix 1.8.11 seems to be internally munging the data and states there is 10Gb available; this is the item setting:

Type: SNMP v2 Agent
SNMP OID: dfKBytesAvail.1
Key: netapp.dfKBytesAvail.1
Type of information: Numeric(float)
Units: B

I can set, or unset the 'use custom multiplier', set a value of say '1024' and it makes absolutely no difference, which seems very odd. I would have thought that would push the value up or down.

Anyone else had this, can offer some guidance?

[kofeyh]

To Answer my own question, I had to select:

Type of information: Numeric(unsigned)
Datatype: decimal
Units: B
Use custom multiplier: Checked, 1024

It appears the typical Numeric(float) will not provide a valid outcome with the metric returned (multiple terabytes). Perhaps it's due to being a 64bit counter?

Who knows..

[ghoz]

I had the same kind of problem.
apparently float is more of a signed decimal thant a double / float