r/scom

This pack is built to answer the question app owners always ask: "the disk is nearly full, why hasn't SCOM alerted?" Explaining the stock Logical Disk Free Space monitor's percentage plus megabyte logic, and when a Warning state actually raises an alert, is a lot of words for a simple question.

How this pack behaves:

- Two monitors, one threshold each. Warning: two consecutive readings below 10% free. Critical: two consecutive readings below 5%, raised as its own alert, so a Critical-only subscription gets a new alert rather than an update to the Warning one.

- The performance counter is the health decision. Our 2017 pack ran a script to collect GB figures, and if that script failed the monitor could stay healthy on a full disk. That dependency is gone: a diagnostic writes free/total GB to Health Explorer after the state changes, so if it fails the alert is already open.

- Recovery needs one real reading at or above the threshold. Restarting the agent while the disk is still low doesn't clear the alerts (tested).

- Three plainly named overrides: free space threshold (% free), sample interval, and consecutive samples before alert. There's an optional companion pack with a 1 TB+ volumes group at 3% / 1.5%.

- An on-demand task, "List largest folders and files on this disk", with a hard timeout, time budget and depth limit. It never follows junctions or mount points. In our lab it scanned about 300k entries on C: in under 10 seconds.

Write-up, download and admin guide: https://www.scom2k7.com/your-disk-is-nearly-full-wheres-the-scom-alert/?utm_source=reddit&utm_medium=social&utm_campaign=disk-mp

Happy to take feedback, especially from anyone who tests it at the default interval or on mount points.

Microsoft has archived the SCOM Managed Instance documentation. The overview page now says the service is "no longer in support" and recommends Azure Monitor or System Center Operations Manager instead, depending on your requirements:

https://learn.microsoft.com/en-us/azure/azure-monitor/scom-manage-instance/overview

A few practical points for anyone affected:

• If you were on MI, on-prem SCOM is the shorter path back. Same engine, same agent-based management packs, so your packs, overrides and tuning carry over.
• Azure Monitor makes sense if your estate has genuinely moved to Azure, but there is no management pack import on that side. If you're monitoring Windows servers, SQL, IIS, AD and DNS on your own hardware, that's a rebuild.
• SCOM 2025 is in mainstream support until January 2030, with extended support to January 2035. For on-prem and hybrid estates, the "SCOM is going away" question looks fairly settled.

Was anyone here actually running MI in production? Curious where people are moving to.

Disclosure: I run SCOM2K7 (we make SCOM tools). I wrote a longer version on our blog; link in the first comment.

I'm seeing this version referenced here: Features and enhancements in Management Pack for SQL Server Analysis Services | Microsoft Learn

But I can't seem to locate it anywhere. Is this available?