How can i setup azure alert when a Data Disk Space is 90% for a windows VM

Question

Hi, I'm trying to add an alert for a data disk in Azure for my Windows VM.

How to set a warning alert mail in azure when the disk capacity reaches more than 90, I want to set this warning in each disk (C:,D:,E:.F: ) separately.

Im using these recommended alerts below but for some reason im not getting any mail when my F drive for example is full and needs more space

Answer 1

Thanks for posting your question in the Microsoft Q&A forum.

To set up Azure alerts:

Go to your Log Analytics workspace and navigate to Agents > Data Collection Rules and create a new rule or modify an existing one. Then add a Performance Counter data source and under Custom, add these counters:

\LogicalDisk(*)\Free Megabytes
\LogicalDisk(*)\% Free Space

Go to your VM in the Azure portal and navigate to Monitoring > Alerts then click New alert rule.

For the signal, choose Custom log search and use this KQL query

Perf
| where ObjectName == "LogicalDisk"
| where CounterName == "% Free Space"
| where InstanceName in ("C:", "D:", "E:", "F:")
| summarize arg_max(TimeGenerated, *) by InstanceName
| where CounterValue <= 10

---

Please don't forget to close up the thread here by upvoting and accept it as an answer if it is helpful