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Errors when setting Channel Limits in bulk

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Hi all,

Newbie to PRTG so apologies if the questions seems trivial to you.

I have created a Library for (example) SQL Servers. I want to adjust all C: OS drive to Warning Limit of 5GB and Error Limit of 2GB Want to set non- OS drive Warning to Warning Limit of 10GB and Error Limit of 5GB.

Steps I am taking:

  1. I go to Sensors > By Type > SNMP Disk Free
  2. Use Filter and use my SQL Tag to Disks for all my SQL Servers
  3. I only choose C: OS drive and click on the right to select all my SQL Server
  4. Go to Setting (Spanner icon) > Channel Setting > Free bytes (ID 1) > Limits > Enable alerting based on limits.
  5. I set "Lower Warning Limit (MB)" to 5000
  6. I set "Lower Error Limit (MB)" to 2000
  7. Set my Warning and Error Messages.
  8. Click OK .

I get error as below:

Error (Bad Request) The Validation of the data you entered has failed. . Channel 0 (Free Space): You have set Alerting to limit-based, but have not entered no limit value

The object has not changed. Error Details:

Version: 21.3.71.1416
Server: akprtgsvr01.stjohn.org.nz
URL: /editsettings?channel=1&want_limitmode=1&limitmode_1=1&want_limitminwarning=1&limitminwarning_1=5000&limitminwarning_1_factor=9.5367431640625E-7&want_limitminerror=1&limitminerror_1=2000&limitminerror_1_factor=9.5367431640625E-7&id=49818,49379,13849,50648,14536,12615,50571,14149,13910,13665,14452,14524,12762,48310,13926,14146
Time: 16:11:37


Anyone can help me with this, not sure what I am doing wrong.
Are there any pre-requisites in need to do before doing bulk Limit changes like this?
I tried the same process on only one SQL Server OS C drive and it worked without any issues.

disk-free limits prtg snmp

Created on Oct 8, 2021 3:14:54 AM by  saiyadra (0) 1

Last change on Oct 8, 2021 6:10:02 AM by  Felix Wiesneth [Paessler Support]



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Hi there,

I noticed uncommon values in the API call:

URL: /editsettings?channel=1&want_limitmode=1&limitmode_1=1&want_limitminwarning=1&limitminwarning_1=5000&limitminwarning_1_factor=
9.5367431640625E-7&want_limitminerror=1&limitminerror_1=2000&limitminerror_1_factor=9.5367431640625E-7&id=49818,49379,13849,50648,14536,12615,50571,14149,13910,13665,14452,14524,12762,48310,13926,14146

Therefore, please try to enter a value in every limit field so we have only integer values.

Created on Oct 12, 2021 1:00:35 PM by  Moritz Heller [Paessler Support]

Last change on Oct 12, 2021 1:01:55 PM by  Moritz Heller [Paessler Support]



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Disclaimer: The information in the Paessler Knowledge Base comes without warranty of any kind. Use at your own risk. Before applying any instructions please exercise proper system administrator housekeeping. You must make sure that a proper backup of all your data is available.