IPMonitor returning odd values for Disk Space poll

I am trying to monitor a directly attached drive on a Win2k3 SP2 server. It is 11.2 TB in size and the free space is 3.91TB. However, when I poll it via SNMP(within ipmonitor 9.01), it returns the following:

space: -8589934592 GB, 0.00 MB; avail: 252.12%

Any idea what is causing this? The other drives are polling fine.

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Accepted answers

Fodome

Hello Udsaxman and co,

The problem is due to the fact that the number of allocation units exceeds the maximum number supported by the Host-Resources MIB, which is 2147483648 (2^31).

In order to get around this limitation, you would need to switch to SNMP Informant which supports integers as high as 4294967296 (2^32). First you need to install the SNMP Informant-STD free client on the remote system. It can be downloaded from here:

http://www.wtcs.org/informant/download.htm

Once it is installed, restart the SNMP service on that system in order for it to load the new dll.

Now edit the Monitor and switch the "Communication Type" to "SNMP (Informant)". Reselect the Drive and click Apply.

Let me know if this helps,

Chris Foley - SolarWinds - Support Specialist
Support: 866.530.8040 | Fax: 512.857.0125
network management simplified | solarwinds.com

All comments

Peter.Cooper

Hello jtopping,

That's a might bit abnormal, and I can't say why it's doing that (right now). Can I ask a favor? Can you please do the following:

Navigate to: ipMonitor Web UI > Configuration Tab > SNMP Monitor Wizard
Use the following oid against your win2k3 sp2 server: 1.3.6.1.2.1.25.2.3.1
Can you post the following values for the 11.2 TB drive?
hrStorageType
hrStorageAllocationUnits
hrStorageSize
hrStorageUsed
hrStorageAllocationFailure

Thanks!

jtopping

Hello jtopping,
That's a might bit abnormal, and I can't say why it's doing that (right now). Can I ask a favor? Can you please do the following:
Navigate to: ipMonitor Web UI > Configuration Tab > SNMP Monitor Wizard
Use the following oid against your win2k3 sp2 server: 1.3.6.1.2.1.25.2.3.1
Can you post the following values for the 11.2 TB drive?
hrStorageType
hrStorageAllocationUnits
hrStorageSize
hrStorageUsed
hrStorageAllocationFailure
Thanks!

Sorry for the delay...this totally slipped my mind

Here you go:

hrStorageTypes.4 (1.3.6.1.2.1.25.2.1.4)

4096

-2042278145

191075255

jtopping

seems to me 11.2TB is too big of a drive for this size of an integer...need more bits...long unsigned int? :-)

Peter.Cooper

seems to me 11.2TB is too big of a drive for this size of an integer...need more bits...long unsigned int? :-)

1 TB = 1,099,511,627,776

11.2 TB = 12,314,530,231,091 ish

11.2 TB / 4096 = 3,006,477,107

hrStorageSize OBJECT-TYPE
SYNTAX Integer32 (0..2147483647)

Looks like ipMonitor is following the MIB a little TOO closely. At least now we know why. If the allocation size was 8192, we'd see what you and I expect.

Might I suggest you try WMI for this one drive? In this spot, we should patch the software to expect the number to actually be Uinteger32. I'll go enter this as a bug.

udsaxman

We are having the same problem. Is there any resolution for this?

Fodome

Hello Udsaxman and co,

The problem is due to the fact that the number of allocation units exceeds the maximum number supported by the Host-Resources MIB, which is 2147483648 (2^31).

http://www.wtcs.org/informant/download.htm

Once it is installed, restart the SNMP service on that system in order for it to load the new dll.

Now edit the Monitor and switch the "Communication Type" to "SNMP (Informant)". Reselect the Drive and click Apply.

Let me know if this helps,

Chris Foley - SolarWinds - Support Specialist
Support: 866.530.8040 | Fax: 512.857.0125
network management simplified | solarwinds.com

Mahendra

Do you have solution for 500 TB size of volume , 4096 Byte allocation unit ???

Which SNMP agent works good for you for this volume size?

///Mahendra