How to monitor and manage disk- Windows Server Capacity Management 101 (12 of 12)

There are two main points to monitor on disk, which are occupancy and performance.

Occupancy – use Free Space Ratio%, this shows you how much space you have left on the disk.

Performance - to measure Performance we use average Response time of reads and average response time of writes.

How to monitor

Thresholds - setting a threshold for disk occupancy is dependent on how quickly you can get additional disk space and how quickly disk space is filling up, but a good rule of thumb is 70%warning and 80% Alarm.

Trends - very important when it comes to disk occupancy as it can show very far in advance when you are going to run out of disk space.

Reports – automate reports

This is a good example of a disk slowly filling up, I could trend on this and easily get the date when I am going to run out of disk space. Having this information is very important in ensuring that there is no down time for any of my important applications. 

I hope my series has been informative and to summarize.

• Capacity management is about ensuring that there is enough IT resource at all times.
• Windows systems are under-utilized because of mistrust in their reliability.
• Virtualization has helped make windows systems more utilized but not completely solved the problem
• It's important to balance the cost of the service to the benefit
• When managing windows systems look at CPU, Memory and Disk.

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Josh Worth

Consultant