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MONIT DISK SPACE WINDOWS

The alerts are good, because they contain both the Percent Free Space and MB Free Space values in the Alert Description:Ĭustomers are so different, I find everyone seems to have a different opinion on how they wish to monitor for free space. BOTH a free space (MB) threshold, and a free space (%) threshold must be met for the monitor to change state.System Disks (C:) have different thresholds than Non-System disks.Alerts are only generated when the monitor is critical.Above you can see the default thresholds. Instead of monitoring for one or the other, using BOTH allow you to adequately monitor large disks, and small disks, effectively. This is important, and very much by design. BOTH the Free Space in MB threshold, AND the Percentage free disk space threshold must be breached for the monitor to change state. This monitor is unique, in that TWO thresholds MUST be met before the monitor detects an unhealthy condition. Third – understand the unhealthy calculation of the monitor. This is because System Disks (C:) are typically smaller than other disks, and have less free space under normal conditions. The default thresholds for System Disks are different that the default threshold for all other disks. Second – understand that this monitor treats SYSTEM disks (typically the C: drive) differently than other disks (non-system). Warnings are for showing state/health only. By default, the monitor will only generate alerts when the monitor is in a Critical health state. This will be the focus of our attention moving forward.įirst – understand when alerts are generated.

MONIT DISK SPACE WINDOWS

Lastly – the Red arrow points to the current and correct monitor for Windows Server 2016 (and later) disks…. They are disabled out of the box and I do not recommend them. In my opinion, they complicated disk monitoring and should have never been put into the MP. They were meant to meet a customer request of “simpler” disk monitoring to make using “Percent only” or “Megabytes free only” monitoring more user friendly.

These were created years ago, and honestly, it probably caused more harm than good. The Blue arrow points to an old Deprecated monitor which is no longer used, and disabled by default. I’ll be using the Windows Server 2016 (and later) MP for examples, version 10.1.0.0 So, this article is dedicated to the topic of free space monitoring for disks in SCOM.

MONIT DISK SPACE HOW TO

However, I still run into customers who don’t fully understand how this works, how to configure it, and some of the good resources documenting this in the past have disappeared. Something like this: df -Ph /var/hadoop/hdfs | tr -d '%' |Īwk 'NR=2' & /opt/do_action.There have been many posts about this over the years, and this is nothing new nor groundbreaking. With that in mind, you can then set awk's exit status using exit() and use that with the regular shell & to execute your script. So you don't need to grep hdfs, you can get it directly and then simply look at the second line ( NR=2 in awk) to skip the header. For example, on my system: $ df -Ph /home/terdonįilesystem Size Used Avail Use% Mounted on You can run df /path/to/directory to get the df output of that directory.

Monit disk space