[Xymon] exclude devices from temp check?

[Christoph Zechner]

Hi,

On 31/08/2021 17:31, Adam Thorn wrote:
> On 30/08/2021 14:55, Christoph Zechner wrote:
>> Hi,
>>
>> I've been using the "temp" check from xymon's plugins (on Debian) and 
>> wanted to ask if it was possible to excluce certain devices from the 
>> check. We have "problems" with an USB stick, which is permanently 
>> plugged into one of our machines and which does not have any 
>> temperature sensors or readings, but sometimes xymon decides it now 
>> has somewhere around 200 °C, which is of course not possible.
> 
> It looks like the 'temp' script just parses the output of hddtemp to 
> produce its report, so I think the approach is to make hddtemp ignore 
> the drive. I think that, by default, hddtemp assumes that a drive 
> temperature is reported by smart attribute 194. Running "hddtemp 
> /dev/sda"  on a drive I know is supported, I'm told:
> 
> /dev/sda: ST500NM0011: 28°C
> 
> That drive model doesn't look to match any of the regexes defined in the 
> first column of my /etc/hddtemp.db so if I add a line to that file:
> 
> "ST500NM0011" 0 C "ST500NM0011"
> 
> (where I think the first column is a regex matching the drive model, the 
> fourth is any human-friendly description, and the 0 means "not 
> supported") then when I run the 'temp' xymon script, the line for 
> /dev/sda switches to clear rather than green and it's excluded from the 
> rrd data.

Great approach, thank you. I entered my USB stick's data into the file 
and hope this changes things. By default, it shows up in xymon as

"drive supported, but it doesn't have a temperature sensor. (SanDisk)"

but every now and then it will trigger an error with temperatures above 
150 °C.

> 
> (Or: maybe the problem is just that your drive uses something other than 
> smart attribute 194 to record the temperature? If so change the "0" to 
> whichever attribute number is the right one)

Since it is a typical USB stick, it does not record temperature and all 
I get from hddtemp is

"SanDisk:  drive supported, but it doesn't have a temperature sensor."

Thanks again, I hope this solves my problem!

Cheers
Christoph

> 
> Adam
> _______________________________________________
> Xymon mailing list
> Xymon at xymon.com
> http://lists.xymon.com/mailman/listinfo/xymon