We find that we have found that some problems crop up every now and again such as Exchange issues that cause large amounts of Transaction logs to occur. We have our clients Exchange logs on separate drives. Every now and again we have an iPhone go on the fritz, an Outlook profile issue, or a PST that gets caught causing an outrageous amount of logs.
We have low thresholds set across the board for our clients mainly by request. We are alerted around 10GB of free space currently. Let's say this issue crops up. Exchange server has a 300GB hard drive in it. The drive has 100GB of free space (just as an example) on it. What we are looking for is a way to monitor that disk for size change in a specific amount of time.
If the disk usage skyrockets at any time in comparison to it's normal disk usage it would send an alarm.
Let's say for our example Exchange eats 10GB of space every half hour, but normal usage is that it uses 1GB every hour, then it sends an alert.
This way we would potentially catch this alarm at 90ish GB free space and see the problem prior to it getting to 10GB of free space and having 30 minutes to clear the logs, and then start troubleshooting.
We are essentially looking for a way to alarm based upon disk usage. The ability to define a warning/critical global, and the ability to override this for specific drives that have high usage (Backup drives).