Robert Hermsen (10/27/2008)
a benefit to storing the data is that in lieu of alerting on 80-90 % drive utilization you can alert on % changed. It allows you to catch when suddenly your drive with 3% monthly growth suddenly changes to 15 % quickly shortening your window.
completely agree. The customer I am at makes use of Quest's Capacity Manager, so we get a GUI on top of that data, but a homegrown version can be as good (or better, as it can be built into any alerting system, whereas Cap Man is outside the alerting structure we have here - we can't see a referenece to "alert sent" for example).
Whether using Cap Man, or a similar tool, or a home grown tool - the importance of predicting, and then measuring, data growth is often under-estimated.